| 1 | Adayevskaya, Ella Georgiyevna | Russian | Neprigozhaya | 1873 | Opera | The Homely Girl |
| 2 | Adayevskaya, Ella Georgiyevna | Russian | Zarya svobodï | 1877 | Opera | The Fir Tree |
| 3 | Agnesi, Maria Teresa | Italian | Il restauro d'Arcadia | 1747 | cantata pastorale | lost |
| 4 | Agnesi, Maria Teresa | Italian | Circo in Armenia | 1753 | dramma serio | frags |
| 5 | Agnesi, Maria Teresa | Italian | La Sofonisba | 1765 | dramma eroico | A-Wgm, Wn |
| 6 | Agnesi, Maria Teresa | Italian | L'insubria consolata | 1766 | componimento drammatico | lost |
| 7 | Agnesi, Maria Teresa | Italian | Nitocri | 1771 | dramma serio | frags |
| 8 | Agnesi, Maria Teresa | Italian | Il re pastore | 1756? | dramma serio | A-Wn |
| 9 | Agnesi, Maria Teresa | Italian | Ulisse in Campania | ? | serenata | I-Nc |
| 10 | Ahlefeldt, Maria Theresia | Danish | Telemak paa Calypsos Øe | 1792 | opera-ballet | DK-Kk |
| 11 | Ahlefeldt, Maria Theresia | Danish | Veddemaalet | 1793 | intermezzo | Kk |
| 12 | Ahlefeldt, Maria Theresia | Danish | La folie, ou Quel conte! | 1789? | comic opera | |
| 13 | Alexandra (Moraru), Liana | Romanian | Criasa zapezii | 1980 | opera | The Snow Queen |
| 14 | Alexandra (Moraru), Liana | Romanian | În labyrint | 1987 | opera | In the Labyrinth |
| 15 | Ali-Zadeh, Franghiz | Azerbaijan | Legenda o belom vsadnike | 1985 | rock-opera | The Legend about White Horseman |
| 16 | Allik, Kristi | Canadian | Loom Sword River | 1982 | opera | |
| 17 | Allitsen, (Mary) Frances | English | Bindra the Minstrel | 1912 | 2-act romantic opera | |
| 18 | Amalia, Princess of Saxony | German | Una donna | 1816 | opera | strength in comic operas |
| 19 | Amalia, Princess of Saxony | German | Le tre cinture | 1816 | opera | |
| 20 | Amalia, Princess of Saxony | German | Le nozze funeste | 1816 | opera | |
| 21 | Amalia, Princess of Saxony | German | Il prigioniere | 1820 | opera | |
| 22 | Amalia, Princess of Saxony | German | L'Americana | 1820 | opera | |
| 23 | Amalia, Princess of Saxony | German | Elvira | 1821 | opera | |
| 24 | Amalia, Princess of Saxony | German | Elisa ed Ernesto | 1823 | opera | |
| 25 | Amalia, Princess of Saxony | German | La fedeltà alla prova | 1826 | opera | |
| 26 | Amalia, Princess of Saxony | German | Vecchiezza e gioventù | 1828 | opera | |
| 27 | Amalia, Princess of Saxony | German | Der Kanonenschuss | 1828 | opera | |
| 28 | Amalia, Princess of Saxony | German | Il figlio pentito | 1831 | opera | |
| 29 | Amalia, Princess of Saxony | German | Il marchesino | 1834 | opera | |
| 30 | Amalia, Princess of Saxony | German | Die Siegesfahne | 1834 | opera | |
| 31 | Amalia, Princess of Saxony | German | La casa disabitata | 1835 | opera | |
| 32 | Anderson, Avril | English | Edward II | 1978 | 1-act opera | |
| 33 | Anderson, Beth | American | Queen Christina | 1973 | opera | |
| 34 | Andree, Elfrida | Swedish | Fritiofs saga | 1899 | opera | unperformed |
| 35 | Anna Amalia, Duchess of Saxe-Weimar | German | Erwin und Elmire | 1776 | Singspiel | |
| 36 | Anspach, Elizabeth | English | The Princess of Georgia | 1799 | opera | |
| 37 | Appeldoorn, Dina | Dutch | Duinsprookje | 1927 | 3-act children's operetta | |
| 38 | Appignani, Adelaide Orsola | Italian | Le avventure di una giornata | 1827 | melodrama | |
| 39 | Appignani, Adelaide Orsola | Italian | I riti indiani | 1834 | | unperformed |
| 40 | Appignani, Adelaide Orsola | Italian | Francesca da Rimini | 1835 | | unperformed |
| 41 | Appignani, Adelaide Orsola | Italian | I pirati | 1843 | melodrama | |
| 42 | Appignani, Adelaide Orsola | Italian | Clara di Clevers | 1876 | melodrama | |
| 43 | Archer, Violet | Canadian | Sganarelle | 1973 | comedy opera | |
| 44 | Archer, Violet | Canadian | The Meal | 1983 | opera | |
| 45 | Arkwright, Marian (Ursula) | English | The Water-Babies | 1863-1922 | operetta | |
| 46 | Arrieu, Claude | French | Cadet-Roussel | 1938-9 | opéra bouffe | |
| 47 | Arrieu, Claude | French | Les deux rendez-vous | 1948 | opéra comique | |
| 48 | Arrieu, Claude | French | Le chapeau à musique | 1953 | opérette enfantine | |
| 49 | Arrieu, Claude | French | La princesse de Babylone | 1953-5 | opéra bouffe | |
| 50 | Arrieu, Claude | French | La cabine téléphonique | 1958 | opéra bouffe | |
| 51 | Arrieu, Claude | French | Balthazar, ou Le mort-vivant | 1966 | opéra bouffe | unperformed |
| 52 | Arrieu, Claude | French | Un clavier pour un autre | 1969-70 | opéra bouffe | |
| 53 | Bacewicz, Grazyna | Polish | Przygoda króla Artura | 1959 | comic opera for radio | televised 1960 |
| 54 | Barberis, Mansi | Romanian | Printesa îndepartata | 1946 | opera | The Distant Princess |
| 55 | Barberis, Mansi | Romanian | Apus de soare | 1958 | opera | Sunset |
| 56 | Barberis, Mansi | Romanian | Kera Duduca | 1964 | television opera | |
| 57 | Barberis, Mansi | Romanian | Caruta cu paiate | 1982 | 3 acts, 2 tableaux | The Cart with Clowns |
| 58 | Barkin, Elaine | American | De amore | 1980 | chamber mini opera | |
| 59 | Bawr, (Alexandrine-)Sophie | French | Les chevaliers du lion | 1804 | mélodrama | music lost |
| 60 | Bawr, (Alexandrine-)Sophie | French | Léon, ou Le château de Montaldi | 1811 | opera | lost |
| 61 | Bayon, Marie Emmanuelle | French | Fleur d'épine | 1776 | opéra comique | |
| 62 | Beach, Amy Marcy | American | Cabildo | 1932 | opera | |
| 63 | Beath, Betty | Australian | The Strange Adventures of Marco Polo | 1973 | opera | rev. 1976 |
| 64 | Beath, Betty | Australian | Balyet | 1990- | opera | |
| 65 | Beaumesnil, Henriette Adélaïde Villard de | French | Anacréon | 1781 | 1-act opera | |
| 66 | Béclard d'Harcourt, Marguerite | French | Raïmi ou fête du soleil | 1737-41 | opera | |
| 67 | Bertin, Louise(-Angelique) | French | Guy Mannering | 1825 | opéra comique | |
| 68 | Bertin, Louise(-Angelique) | French | Le loup-garou | 1827 | opéra comique | |
| 69 | Bertin, Louise(-Angelique) | French | Fausto | 1831 | opera semiseria | |
| 70 | Bertin, Louise(-Angelique) | French | La Esmeralda | 1836 | 4 acts | |
| 71 | Bibby, Gillian | New Zealand | Sanctuary of Spirits | 1970 | children's opera | |
| 72 | Bidart, Lycia de Biase | Brazilian | A noiva do mar | 1939 | opera | |
| 73 | Blahetka, (Marie) Leopoldine | Austrian | Die Räuber und der Sänger | ? | opera | |
| 74 | Bond, Victoria | American | Gulliver | 1988 | opera | |
| 75 | Bottini, Marianna | Italian | Elena e Gerardo | 1822 | opera | unperformed |
| 76 | Boulanger, Lili | French | La Princesse Maleine | 1912-1918 | opera | inc. |
| 77 | Boyd, Anne (Elizabeth) | Australian | The Little Mermaid | 1977-78 | children's opera | |
| 78 | Boyd, Anne (Elizabeth) | Australian | The Beginning of the Day | 1980 | children's opera | |
| 79 | Boyle, Ina | Irish | Maudlin of Paplewick | 1964-66 | opera | |
| 80 | Bright, Dora Estella | English | The Portrait | 1911? | opera | |
| 81 | Bright, Dora Estella | English | Quong Lung's Shadow | ? | ? | |
| 82 | Britain, Radie | American | Happyland | 1946 | operetta | |
| 83 | Britain, Radie | American | Kuthara | 1960 | chamber opera | |
| 84 | Bronsart, Ingeborg | German | Die Göttin von Sais, oder Linas und Liane | 1867 | idyllische Oper | lost |
| 85 | Bronsart, Ingeborg | German | Jery und Bätely | 1873 | operette | |
| 86 | Bruzdowicz, Joanna | Polish | Tides and Waves | 1992 | opera-musical | |
| 87 | Bruzdowicz, Joanna | Polish | Maisonneuve | 1992 | opera-musical | |
| 88 | Buchanan, Dorothy Quita | New Zealand | Greenleaf | 1985 | opera | |
| 89 | Burrell, Diana | English | The Albatross | 1987 | opera | |
| 90 | Caccini, Francesca | Italian | La fiera | 1619 | intermedi and incid music | portrayal of women - controversial |
| 91 | Caccini, Francesca | Italian | Il martirio di S Agata | 1622 | opera? | coll. With G. B. Da Gagliano, Caccini wrote two parts, music lost |
| 94 | Caccini, Francesca | Italian | La liberazione di Ruggiero | 1625 | commedia in musica | |
| 95 | Calosso, Eugenia | Italian | Vespero | 1878-1914 | opera | |
| 96 | Canal, Marguerite | French | Tlass Atka (Le pays blanc) | 1922? | opera | inc. |
| 97 | Candeille, (Amelie) Julie | French | Ida, ou L'orpheline de Berlin | 1807 | opéra comique | also other inc music for plays |
| 98 | Carmichael, Mary Grant | British | The Frozen Heart, or The Snow Queen | 1898 | operetta | |
| 99 | Casagemas, Luisa | Spanish | Schiava e regina | c.1880 | opera | |
| 100 | Cecconi-Botella, Monic | French | Il était une fois l'été | 1976 | opéra-film | |
| 101 | Cecconi-Botella, Monic | French | Scoop: état de siège en Pologne | 1982 | mini-opéra | |
| 102 | Cecconi-Botella, Monic | French | La femme de l'orgre | 1986-88 | opéra-conte | |
| 103 | Cecconi-Botella, Monic | French | Il signait Vincent | 1987-90 | opéra-passion | |
| 104 | Cecconi-Botella, Monic | French | | | 2 operas by and for children | |
| 105 | Chaminade, Cecile | French | La Sévillane | 1882 | opéra comique | private perf |
| 106 | Chrétien, Hedwige | French | Le menuet de l'impératrice | 1889 | comic opera | |
| 107 | Chrétien, Hedwige | French | La cinquantaine | 1911 | comic opera | |
| 108 | Chudova, Tat'yana Alexeyevna | Russian | O myortvoy tsarevne i semi bogatïryakh | 1966-7 | fairy tale opera | The Dead Princess and the Seven Heroes |
| 109 | Clingan, Judith Ann | Australian | | b.1945 | 4 children's operas | |
| 110 | Clostre, Adrienne | French | Le chant du cygne | 1960 | chamber opera | |
| 111 | Coates, Gloria | American | Fall of the House of Usher | 1962 | opera | |
| 112 | Coleman, Ellen | English | The Walled Garden | 1886-1973? | opera | wrote 2 operas total |
| 113 | Daiken, Melanie Ruth | English | Eusebius | 1968 | opera | |
| 114 | Daiken, Melanie Ruth | English | Mayakovsky and the Sun | 1971 | opera | |
| 115 | Daiken, Melanie Ruth | English | Playboy of the Western World | inc | | |
| 116 | Daniels, Mabel | American | A Copper Complication | 1900 | operetta | |
| 117 | Daniels, Mabel | American | The Court of Hearts | 1900 | operetta | |
| 118 | Daniels, Mabel | American | Alice in Wonderland Cont'd | 1902-04 | opera sketch | |
| 119 | Daniels, Mabel | American | The Legend of Marietta | 1909 | operetta | |
| 120 | Dell'Acqua, Eva | Belgian | La ruse de Pierrette | 1890 | opera/operetta | wrote about 15 operas and operettas |
| 121 | Dell'Acqua, Eva | Belgian | Bachelette | 1896 | opera/operetta | |
| 122 | Dell'Acqua, Eva | Belgian | Tambour-Battant | 1900 | opera/operetta | |
| 123 | Dell'Acqua, Eva | Belgian | Zizi | ? | opera/operetta | |
| 124 | Dell'Acqua, Eva | Belgian | Pierrot Menteur | ? | opera/operetta | |
| 125 | Delle Grazie, Gisella | Italian | Atala | 1894 | opera | |
| 126 | Delle Grazie, Gisella | Italian | La trecciaiuola di Firenze | 1895 | opera | |
| 127 | Desportes, Yvonne | French | Maître Cornélius | 1939-40 | opera | |
| 128 | Desportes, Yvonne | French | Le farce du carabinier | 1943 | opéra comique | |
| 129 | Desportes, Yvonne | French | La chanson de Mimi Pinson | 1961 | opérette | |
| 130 | Desportes, Yvonne | French | Le forgeur de merveilles | 1965 | opera | |
| 131 | Dinescu, Violeta | Romanian | Hunger und Durst | 1986 | chamber opera | |
| 132 | Dinescu, Violeta | Romanian | Mai | 1986 | children's opera | |
| 133 | Dinescu, Violeta | Romanian | Eréndira | 1991 | chamber opera | |
| 134 | Dlugoszewski, Lucia | American | Tiny Opera | 1953 | opera | |
| 135 | Dlugoszewski, Lucia | American | The Heidi Songs | 1972- | opera | |
| 136 | Duval, Mlle | French | Les Génies | 1736 | opera | 2nd opera by a woman at the Paris Opera |
| 137 | Eiríksdóttir, Karólína | Icelandic | Someone I have Seen | 1988 | chamber opera | |
| 138 | Ekizian, Michelle | American | David of Sassoun | 1992 | chamber opera | |
| 139 | Eksanishvili, Eleonora Grigor'yevna | Georgian | | b.1919 | 2 children's operas | |
| 140 | Elcheva, Irina Mikhaylovna | Rusian | Spartak | 1962 | opera | |
| 141 | Ewart, Florence Maud | Australian | Ekkehard | c1920 | opera | excerpts exist |
| 142 | Ewart, Florence Maud | Australian | The Courtship of Miles Standish | 1930 | opera | |
| 143 | Ewart, Florence Maud | Australian | Mateo Falconé | 1933 | opera | |
| 144 | Ewart, Florence Maud | Australian | Nala's Wooing | 1933 | opera | unperformed |
| 145 | Ewart, Florence Maud | Australian | Pepita's Miracle | 1945 | opera | unperformed |
| 146 | Ewart, Florence Maud | Australian | A Game of Chess | 1949 | opera | inc. |
| 147 | Ferrari, Carlotta | Italian | Ugo | 1857 | opera - dramma lirico | |
| 148 | Ferrari, Carlotta | Italian | Sofia | 1866 | opera - dramma lirico | |
| 149 | Ferrari, Carlotta | Italian | Eleanora d'Arborea | 1871 | opera - dramma lirico | |
| 150 | Fine, Vivian | American | The Women in the Garden | 1977 | chamber opera | |
| 151 | Finzi, Graciane | French | Pauvre assassin | 1987-91 | opera | |
| 152 | Firsova, Elena (Olegovna) | Russian | Pir vo vremya chumï | 1972 | chamber opera | Feast in Plague Time |
| 153 | Firsova, Elena (Olegovna) | Russian | Solovey i roza | 1991 | chamber opera | The Nightingale and the Rose |
| 154 | Fleischer, Tsippi | | Medea | | opera | |
| 155 | Folville, Eugénie-Emilie Juliette | Belgian | Atala | 1892 | opera | |
| 156 | Fox, Erika | English | The Dancer, Hotoke | 1991 | opera | possibly 2 more? |
| 157 | Freer, Eleanor Everest | American | The Legend of the Piper | 1922 | opera | |
| 158 | Freer, Eleanor Everest | American | Massimilliano, the Court Jester | 1926 | opera | |
| 159 | Freer, Eleanor Everest | American | The Chilkoot Maiden | 1926 | opera | |
| 160 | Freer, Eleanor Everest | American | A Christmas Tale | 1928 | opera | |
| 161 | Freer, Eleanor Everest | American | The Masque of Pandora | 1928 | opera | |
| 162 | Freer, Eleanor Everest | American | Preciosa, of The Spanish Student | 1928 | opera | |
| 163 | Freer, Eleanor Everest | American | Frithiof | 1929 | opera | |
| 164 | Freer, Eleanor Everest | American | Joan of Arc | 1929 | opera | |
| 165 | Freer, Eleanor Everest | American | A Legend of Spain | 1931 | opera | |
| 166 | Freer, Eleanor Everest | American | Little Women | 1934 | opera | |
| 167 | Freer, Eleanor Everest | American | The Brownings go to Italy | 1936 | opera | |
| 168 | Gabriel, Mary Ann Virginia | English | Widows Bewitched | 1865 | operetta | |
| 169 | Gabriel, Mary Ann Virginia | English | Who's the Heir | 1870 | operetta | |
| 170 | Gabriel, Mary Ann Virginia | English | Grass Widows | 1873 | operetta | |
| 171 | Gabriel, Mary Ann Virginia | English | Graziella | 1875 | operetta | |
| 172 | Gabriel, Mary Ann Virginia | English | The Love Tests | ? | operetta | |
| 173 | Gabriel, Mary Ann Virginia | English | The Shepherd of Cournouailles | ? | operetta | c. 7 more operettas |
| 174 | Gail, (Edmee) Sophie | French | Les deux jaloux | 1813 | 1-act opera | |
| 175 | Gail, (Edmee) Sophie | French | Mlle de Launay à la Bastille | 1813 | 1-act opera | |
| 176 | Gail, (Edmee) Sophie | French | Angéla, ou L'atelier de Jean Cousin | 1814 | 1-act opera | with Boieldieu |
| 177 | Gail, (Edmee) Sophie | French | La sérénade | 1818 | 1-act opera | |
| 178 | Gardner, Kay | American | Ladies Voices: A Short Opera | 1981 | stage? | with Steinham |
| 179 | Garelli della Moreau, Vincenza | Italian | Incantesimo | 1915 | operetta | |
| 180 | Garelli della Moreau, Vincenza | Italian | Il viaggio dei Perrichon | 1916 | operetta | |
| 181 | Garelli della Moreau, Vincenza | Italian | Le nozze di Leporello | 1924 | comedia | |
| 182 | Geddes-Harvey, Anne Catherine) Roberta | Canadian | La terre bonne | 1903 | opera | lost, except for one song |
| 183 | Gerrish-Jones, Abbie | American | Priscilla | 1863-1929 | opera | |
| 184 | Gerrish-Jones, Abbie | American | Abon Hassan | | opera | |
| 185 | Gerrish-Jones, Abbie | American | The Milkmaid's Fair | | opera | |
| 186 | Gerrish-Jones, Abbie | American | The Snow Queen | | opera | |
| 187 | Gerrish-Jones, Abbie | American | The Andalusians | | opera | |
| 188 | Gerrish-Jones, Abbie | American | Two Roses | | opera | |
| 189 | Gerrish-Jones, Abbie | American | Sakura-San | | opera | |
| 190 | Gerrish-Jones, Abbie | American | Aztec Princess | | opera | |
| 191 | Gideon, Miriam | American | Fortunato | 1958 | opera | |
| 192 | Giteck, Janice | American | A'agita | 1976 | opera | |
| 193 | Giuranna, Barbara | Italian | Jamanto | 1941 | opera lirica | |
| 194 | Giuranna, Barbara | Italian | Mayerling | 1961 | opera lirica | |
| 195 | Giuranna, Barbara | Italian | Hosanna | 1978 | opera lirica | |
| 196 | Glanville-Hicks, Peggy | Australian | Caedmon | 1933 | opera | 3 scenes |
| 197 | Glanville-Hicks, Peggy | Australian | The Transposed Heads | 1954 | opera | |
| 198 | Glanville-Hicks, Peggy | Australian | The Glittering Gate | 1956 | opera | |
| 199 | Glanville-Hicks, Peggy | Australian | Nausicaa | 1961 | opera | |
| 200 | Glanville-Hicks, Peggy | Australian | Carlos among the Candles | 1962 | opera | unperformed |
| 201 | Glanville-Hicks, Peggy | Australian | Sappho | 1965 | opera | unperformed |
| 202 | Gonzaga, Chiquinha | Brazilian | Forrobodó | 1912 | operetta | 150+ performances |
| 203 | Grandval, Marie | French | Le sou de Lise | 1859 | opérette | |
| 204 | Grandval, Marie | French | Les fiancés de Rosa | 1863 | opéra comique | |
| 205 | Grandval, Marie | French | La comtesse Eva | 1864 | opéra comique | |
| 206 | Grandval, Marie | French | Donna Maria Infanta di Spagna | 1865 | opéra comique | |
| 207 | Grandval, Marie | French | La pénitente | 1868 | opéra comique | |
| 208 | Grandval, Marie | French | Piccolino | 1869 | opera | |
| 209 | Grandval, Marie | French | La forêt | 1875 | poème lyrique | |
| 210 | Grandval, Marie | French | Atala | c1888 | poème lyrique | |
| 211 | Grandval, Marie | French | Mazeppa | 1899 | opera | |
| 212 | Grétry, Lucile | French | Le marriage d'Antonio | 1786 | comédie mêlée d'ariettes | |
| 213 | Grétry, Lucile | French | Toinette et Louis | 1787 | diverssement mêlée d'ariettes | |
| 214 | Grever, María | Mexican | The Gyspy | 1927? | song drama | 1 act |
| 215 | Grever, María | Mexican | El cantarito | 1939? | miniature opera | possibly more? |
| 216 | Grigsby, Beverly | American | Moses | 1978 | opera | |
| 217 | Grigsby, Beverly | American | The Mask of Eleanor | 1984 | opera | |
| 218 | Grigsby, Beverly | American | The Vision of Saint Joan | 1987 | opera | |
| 219 | Gubaydulina, Sofiya Asgatovna | Russian | Era vodoleya | 1991 | oratorio-opera-ballet | Age of Aquarius |
| 220 | Gyring, Elizabeth | Austrian/American | Night at Sea and Day in Court | 1954 | opera | |
| 221 | Hajdú, Júlia | Hungarian | | 1915-87 | 14 operettas, musicals, etc. | |
| 222 | Halácsy, Irma von | Austrian | Antinoos | 1909 | opera | |
| 223 | Halácsy, Irma von | Austrian | Abbé Mouret | 1921 | opera | |
| 224 | Halácsy, Irma von | Austrian | Der Puppenspieler | 1922 | opera | |
| 225 | Halácsy, Irma von | Austrian | Herz atout | 1923 | opera | |
| 226 | Halácsy, Irma von | Austrian | Schelmenerbschaft | 1943 | opera | |
| 227 | Halácsy, Irma von | Austrian | Salambo | 1948 | opera | none performed complete |
| 228 | Hara, Kazuko | Japanese | The Case Book of Sherlock Holmes: the Confession | 1981 | opera | |
| 229 | Hara, Kazuko | Japanese | On the Merry Night | 1982-3 | opera | |
| 230 | Hara, Kazuko | Japanese | Chieko-Sho | 1978 | | rev. 1984 |
| 231 | Hara, Kazuko | Japanese | Sute-hime | 1985 | opera | |
| 232 | Hara, Kazuko | Japanese | Sonezako-Shinju | 1986 | opera | |
| 233 | Hara, Kazuko | Japanese | Beyond Brain Death | 1987 | opera | |
| 234 | Hara, Kazuko | Japanese | The History of Yosakoi-bushi | 1988 | opera | |
| 235 | Hara, Kazuko | Japanese | Iwanaga-hime | 1990 | opera | |
| 236 | Hara, Kazuko | Japanese | Petro Kibe | 1991 | opera | |
| 237 | Hara, Kazuko | Japanese | Nasu-no Yoichi | 1991 | opera | |
| 238 | Harraden, R. Ethel | English | All about a Bonnet | 1880s | operetta | |
| 239 | Harraden, R. Ethel | English | His Last Chance | 1891 | operetta | |
| 240 | Harraden, R. Ethel | English | The Taboo | 1895 | operetta | |
| 241 | Harrison, Annie Fortescue | English | The Ferry Girl | 1851-1944 | operetta | |
| 242 | Harrison, Annie Fortescue | English | The Lost Husband | 1886 | operetta | |
| 243 | Hays, Sorrel | American | Love in Space | 1986 | radio opera | |
| 244 | Hays, Sorrel | American | Touch of Touch | 1989 | video opera | |
| 245 | Hays, Sorrel | American | The Glass Woman | 1989-93 | ? | |
| 246 | Hays, Sorrel | American | The Venus Project | ? | radio opera | |
| 247 | Hays, Sorrel | American | The Everybodydom | 1994 | children's radio opera | |
| 248 | Heckscher, Celeste de Longpré | American | The Flight of Time | 1860-1928 | | |
| 249 | Heckscher, Celeste de Longpré | American | Rose of Destiny | 1918 | | |
| 250 | Hill, Mirrie (Irma) | Australian | Old Mr. Sundown | 1935 | children's operetta | |
| 251 | Holmès, Augusta | French | La montagne noir | 1895 | | |
| 252 | Holmès, Augusta | French | Héro et Léandre | 1875 | opera | unperformed |
| 253 | Holst, Imogen (Clare) | English | Benedick and Beatrice | 1951 | opera | |
| 254 | Hölszky, Adriana | Romanian | Bremer Freiheit | 1987 | opera | |
| 255 | Ivey, Jean Eichelberger | American | The Birthmark | 1980-82 | opera | |
| 256 | Jacquet de la Guerre, Elizabeth-Claude | French | Cephale et Procris | 1694 | opera | |
| 257 | James, Dorothy | American | Paolo and Francesca | 1933 | opera | |
| 258 | Jeske-Choinska-Mikorska, Ludmila | Polish | Zuch dziewczyna | 1884 | operetta | The Brave Girl |
| 259 | Jeske-Choinska-Mikorska, Ludmila | Polish | Markizde Créqui | 1892 | operetta | |
| 260 | Kinkel, Johanna | German | Die Landpartie | 1810-58 | operetta | possibly more? - liederspiel |
| 261 | Klinkova, Zhivka | Bulgarian | Petko Samohavalko | 1956 | children's opera | other children's operas |
| 262 | Klinkova, Zhivka | Bulgarian | The Most Improbable | 1980 | fairy-tale opera | |
| 263 | Klinkova, Zhivka | Bulgarian | Cyril and Methodius | 1981 | opera | |
| 264 | Klinkova, Zhivka | Bulgarian | Vassil Levski | 1992 | opera | |
| 265 | Korn, Clara Anna | American | Their Last War | 1932 | opera | |
| 266 | Kralik von Mayerswalden, Mathilde | Austrian | Blume und Weissblume | 1907 | opera | |
| 267 | Krzyzanowska, Halina | Polish | Magdusia | >1894 | 1-act opera | |
| 268 | Lachartre, Nicole | French | Babylone malde, ou la nuit du thermomètre | 1981 | mini-opéra comique | |
| 269 | Lachartre, Nicole | French | Les grenouilles n'ont pas de dents | 1984 | children's mini-opera | |
| 270 | Lambiri, Eleni | Greek | To apokriatiko oneiro | 1913 | operetta | A Dream in Carnival |
| 271 | Larsen, Libby | American | The Silver Fox | 1979 | children's opera | |
| 272 | Larsen, Libby | American | Psyke and the Pskyskraper | 1982 | chamber opera | |
| 273 | Larsen, Libby | American | A Wrinkle in Time | 1991-92 | opera | |
| 274 | Larsen, Libby | American | Mrs. Dalloway | 1993 | opera | |
| 275 | LeBaron, Anne | American | The E. & O. Line | 1991 | electric blues opera | |
| 276 | Le Beau, Luise Adolpha | German | Hadumoth | 1888-91 | opera | |
| 277 | Le Beau, Luise Adolpha | German | Der verzauberte Kalif | 1901-03 | fantasy opera | |
| 278 | LeFanu, Nicola | English | Dawnpath | 1977 | chamber opera | |
| 279 | LeFanu, Nicola | English | The Story of Mary O'Neill | 1986 | radiophonic opera | |
| 280 | LeFanu, Nicola | English | The Green Children | 1990 | children's opera | |
| 281 | LeFanu, Nicola | English | Blood Wedding | 1992 | opera | |
| 282 | Leginska, Ethel | English | The Rose and the Ring | 1932 | opera | |
| 283 | Lehman, Liza | English | The Vicar of Wakefield | 1902 | romantic light opera | |
| 284 | Lili'uokalani | Hawaiian | Mohailani | inc | comic opera | Hawaiian Queen |
| 285 | Linwood, Mary | English | The Kellerin | 1755/6-1845 | opera | |
| 286 | Loder, Kate (Fanny) | English | L'elisir d'amore | 1825-1904 | opera | |
| 287 | Lomon, Ruth (Margaret) | American | The Fisherman and his Soul | 1963 | chamber opera | |
| 288 | Lund, Gudrun | Danish | Simple Johnny | 1991 | mini-opera | |
| 289 | Lutyens, Elisabeth | English | Infidelio | 1954 | opera | |
| 290 | Lutyens, Elisabeth | English | The Numbered | 1965-7 | opera | |
| 291 | Lutyens, Elisabeth | English | The Waiting Game | 1973 | opera | unperformed |
| 292 | Lutyens, Elisabeth | English | The Goldfish Bowl | 1975 | ballad opera | unperformed |
| 293 | Lutyens, Elisabeth | English | Like a Window | 1976 | opera | |
| 294 | Lyadova, Lyudmila Alexeyevna | Russian | Pod chyornoy maskoy | 1960 | operetta | Behind a Black Mask |
| 295 | Lyadova, Lyudmila Alexeyevna | Russian | Shakhtyorskiye nevestï | 1984 | operetta | Miners' Brides |
| 296 | Lyadova, Lyudmila Alexeyevna | Russian | Dva tsveta vremeni | 1986 | opera | Two Colours of the Time |
| 297 | Maconchy, Elizabeth | English | The Jesse Tree | 1969 | church opera | |
| 298 | Maconchy, Elizabeth | English | Johnny and the Mohawks | 1969 | children's opera | |
| 299 | Maconchy, Elizabeth | English | The King of the Golden River | 1975 | children's opera | |
| 300 | Maddison, Adela | Irish | Der Talisman | 1910 | opera | |
| 301 | Maddison, Adela | Irish | The Children of Lir | 1920 | opera | |
| 302 | Mageau, Mary | Australian | Mighty Skity, or The Rabbit who Knew too Much | 1985 | children's opera | |
| 303 | Mageau, Mary | Australian | Australis 1788 | 1987 | music drama | |
| 304 | Manning, Kathleen Lockhart | American | Operetta in Mozartian Style | 1925-6 | stage | |
| 305 | Manziarly, Marcelle de | French | La femme en flèche | 1954 | chamber opera | |
| 306 | Marshall, Florence Ashton | English | The Masked Shepherd | 1879 | operetta | only 1 partsong remains |
| 307 | Marshall, Florence Ashton | English | Prince Sprite | 1897 | fairy operetta | |
| 308 | Martinez(-Mijares) Odaline de la (Caridad) | American | Sister Aimée | 1978 | opera | |
| 309 | Martins, Maria de Lourdes | Portuguese | Silêncio, onde estás tu?, op. 15 | 1958 | radio opera | |
| 310 | Martins, Maria de Lourdes | Portuguese | As três máscaras | 1984 | opera | |
| 311 | Matuszczak, Bernadetta | Polish | Julia i Romeo | 1967 | chamber opera | |
| 312 | Matuszczak, Bernadetta | Polish | Humanae voces | 1971 | opera-oratorio | |
| 313 | Matuszczak, Bernadetta | Polish | Mysterium Hloizy | 1974 | opera | |
| 314 | Matuszczak, Bernadetta | Polish | Pamietnik wariata | 1976 | opera-monodrama | A Madman's Diary |
| 315 | Matuszczak, Bernadetta | Polish | Apocalypsys | 1977 | opera-oratorio | |
| 316 | Matuszczak, Bernadetta | Polish | Prometeo | 1982 | opera da camera | |
| 317 | Metallidi, Zhanneta Lazarevna | Russian | Tarakanishche | 1992 | opera | The Cockroach |
| 318 | Moberg, Ida Georgina | Finnish | Asiens Ijus | 1945-6 | opera | incomplete |
| 319 | Monk, Meredith | American | Vessel | 1971 | opera epic | |
| 320 | Monk, Meredith | American | Education of the Girlchild | 1972 | opera | |
| 321 | Monk, Meredith | American | Quarry | 1976 | opera | |
| 322 | Monk, Meredith | American | Specimen Days | 1981 | opera | |
| 323 | Monk, Meredith | American | Atlas | 1991 | opera | |
| 324 | Moore, Dorathy Rudd | American | Frederick Douglas | 1979 | opera | |
| 325 | Moore, Mary Carr | American | The Oracle | 1894 | operetta | |
| 326 | Moore, Mary Carr | American | Narcissa, or The Cost of Empire | 1909 | grand opera | |
| 327 | Moore, Mary Carr | American | The Leper | 1912 | opera | unperformed |
| 328 | Moore, Mary Carr | American | Harmony | 1917 | operetta | |
| 329 | Moore, Mary Carr | American | The Flaming Arrow, or The Shaft of Ku'pish-ta-ya | 1919-20 | operetta | |
| 330 | Moore, Mary Carr | American | David Rizzio | 1927-28 | opera | |
| 331 | Moore, Mary Carr | American | Legend provençale | 1929-35 | opera | unperformed |
| 332 | Moore, Mary Carr | American | Los rubios | 1931 | opera | |
| 333 | Moore, Mary Carr | American | Flutes of Jade Happiness | 1932-33 | operetta | |
| 334 | Munktell, Helena | Swedish | In Firenze | 1889 | opéra comique | |
| 335 | Musgrave, Thea | Scottish | The Abbott of Drimock | 1955 | comic opera | |
| 336 | Musgrave, Thea | Scottish | Marko the Miser | 1962 | children's opera | |
| 337 | Musgrave, Thea | Scottish | The Decision | 1964-5 | opera | |
| 338 | Musgrave, Thea | Scottish | The Voice of Ariadne | 1973 | chamber opera | |
| 339 | Musgrave, Thea | Scottish | Mary Queen of Scots | 1977 | opera | |
| 340 | Musgrave, Thea | Scottish | A Christmas Carol | 1979 | opera | |
| 341 | Musgrave, Thea | Scottish | An Occurrence at Owl Creek Bridge | 1981 | radio opera | |
| 342 | Musgrave, Thea | Scottish | Harriet, the Woman Called Moses | 1984 | opera | |
| 343 | Musgrave, Thea | Scottish | Simon Bolívar | 1992 | opera | |
| 344 | Newlin, Dika | American | Feathertop | 1942 | opera | 1 act |
| 345 | Newlin, Dika | American | The Scarlet Letter | 1945 | opera | 3 acts |
| 346 | Newlin, Dika | American | Smile Right to the Bone | 1941? | opera | |
| 347 | Oh, Sook-Ja | Korean | Won-Sul-Lang | 1990 | opera | Wonsullang; The Son of a Knight |
| 348 | Oliveros, Pauline | American | Lunar Opera: Deep Listening For-Tunes | | opera | |
| 349 | Oliveros, Pauline | American | Io and the Trouble with Him | | opera | |
| 350 | Oosterzee, Cornélie van | Dutch | Das Gelöbnis | 1863-1943 | music drama | Italian verismo |
| 351 | Pade, Else Marie | Danish | Far, mor og bØrn | 1974 | children's opera | Father, Mother and Children |
| 352 | Paradis, Maria Theresia von | Austrian | Ariadne und Bacchus | 1791 | melodrama | lost |
| 353 | Paradis, Maria Theresia von | Austrian | Der Schulkandidat | 1792 | ländliches Singspiel | Act 3 and pt of Act 2 lost |
| 354 | Paradis, Maria Theresia von | Austrian | Rinaldo und Alcina | 1797 | opera | lost |
| 355 | Paradis, Maria Theresia von | Austrian | Grosse militärische Oper | 1805? | opera | lost |
| 356 | Paradis, Maria Theresia von | Austrian | Zwei ländliche Opern | ? | opera | lost |
| 357 | Paredes, Hilda | Mexican | La séptima semilla | 1989 | chamber opera | |
| 358 | Patterson, Annie | Irish | The High-King's Daughter | 1868-1934 | opera | |
| 359 | Patterson, Annie | Irish | Oísin | ? | opera | |
| 360 | Pelegrí i Marimón, Maria Teresa | Spanish | Herodes und Mariamne | 1979-83 | opera | |
| 361 | Pentland, Barbara | Canadian | The Lake | 1952 | chamber opera | |
| 362 | Perrière-Pilte, Anaïs | French | Les vacances de l'Amour | 1867 | opéra comique | |
| 363 | Perrière-Pilte, Anaïs | French | Le sorcier | 1866 | operetta | |
| 364 | Perrière-Pilte, Anaïs | French | Jaloux de soi | 1873 | operetta | |
| 365 | Perrière-Pilte, Anaïs | French | Le talon d'Achille | 1875 | operetta | |
| 366 | Perry, Julia | American | The Bottle | 1953 | opera | |
| 367 | Perry, Julia | American | The Cask of Amontillado | 1953 | opera | |
| 368 | Perry, Julia | American | The Selfish Giant | 1964 | opera-ballet | |
| 369 | Perry, Julia | American | Three Warnings | ? | opera | |
| 370 | Petra-Basacopol, Carmen | Romanian | Cuore | 1983 | opera | |
| 371 | Petra-Basacopol, Carmen | Romanian | Apostol Bologa | 1989 | opera | |
| 372 | Petrová, Elena | Czech | Kdyby se slunce nevrátilo | 1982-3 | opera | Suppose the Sun did not Return |
| 373 | Petrova, Mara | Bulgarian | title unknown | b.1921 | opetta | |
| 374 | Poldowski [Wieniawska, Irena Regina] | Polish | Laughter | 1880-1932 | operetta | |
| 375 | Ptaszyska, Marta | Polish | Oskar z Alwy | 1971 | opera | Oscar from Alva |
| 376 | Puget, Loïsa | French | Le mauvais oeil | 1836 | operetta | text by Scribe |
| 377 | Puget, Loïsa | French | La veilleuse, ou Les nuits de milade | 1869 | operetta | |
| 378 | Radermacher, Erika | Swiss | Das Tanzlegendchen | 1990 | opera | |
| 379 | Raum, Elizabeth | American | The Final Bid | 1981 | opera | |
| 380 | Raum, Elizabeth | American | The Garden of Alice | 1985 | opera | |
| 381 | Raum, Elizabeth | American | Eos: the Dream of Nicholas Flood Davin | 1991 | opera | |
| 382 | Ravinale, Irma | Italian | Il ritratto di Dorian Gray | 1970 | opera | |
| 383 | Reid, Sally Johnston | American | Dramatic: Healing | 1986 | chamber opera | |
| 384 | Respighi, Elsa | Italian | Alcesti | 1941 | opera | 1 act |
| 385 | Respighi, Elsa | Italian | Samurai | ? | opera | 3 acts |
| 386 | Reverdy, Michèle | French | Le chateau | 1980 | opera | |
| 387 | Reverdy, Michèle | French | La nuit qui suivit notre dernier dîner | 1984 | opéra de poche | |
| 388 | Reverdy, Michèle | French | Vincent 97 paroles de la vie et de la mort de Vincent Van Gogh | 1984-9 | opera | |
| 389 | Riseman, Shoshana | Israeli | The Brave Soldier Zweig | b.1948 | operetta | |
| 390 | Rodrigo, Maria | Spanish | Becqueriana | 1915 | opera | |
| 391 | Rodrigo, Maria | Spanish | La flor de la vida | ? | opera | |
| 392 | Rodriguez, Marcela | Mexican | La Sunamita | 1991 | opera | |
| 393 | Roe, Betty | English | Gaslight | 1983 | opera | |
| 394 | Roe, Betty | English | Canterbury Morning | 1986 | opera | |
| 395 | Roe, Betty | English | A Flight of Pilgrims | 1993 | opera | 2 more operas - titles unknown |
| 396 | Romero, Elena | Spanish | Marcela | 1957 | chamber opera | |
| 397 | Rosselli-Nissim, Mary | Italian | Nephta | 1891 | opera | 1 act |
| 398 | Rosselli-Nissim, Mary | Italian | Max | 1898 | opera | 2 acts |
| 399 | Rosselli-Nissim, Mary | Italian | Fiamme | 1915 | opera | 3 acts |
| 400 | Rosselli-Nissim, Mary | Italian | Andrea del Sarto | 1931 | opera | 3 acts |
| 401 | Runcie, Constance Faunt Le Roy | American | The Prince of Asturia | 1836-1911 | opera | |
| 402 | Saint-Marcoux, Micheline Coulombe | Canadian | Transit | 1984 | opera | |
| 403 | Schonthal, Ruth | American | The Courtship of Camilla | 1979-80 | opera | |
| 404 | Schonthal, Ruth | American | Princess Maleen | 1988 | opera | |
| 405 | Schorr, Eva | German | Die Katze des Königs | 1989 | opera | |
| 406 | Sehested, Hilda | Danish | Agnete og Havmanden | 1913 | opera | |
| 407 | Sekacz, Ilona | English | A Small Green Space | 1989 | opera | |
| 408 | Serova, Valentina Semyonovna | Russian | Uriel Acosta | 1885 | opera | |
| 409 | Serova, Valentina Semyonovna | Russian | Marie d'Orval | 1880s | opera | lost |
| 410 | Serova, Valentina Semyonovna | Russian | Il'ys Muromets | 1899 | opera | |
| 411 | Serova, Valentina Semyonovna | Russian | Vstrepenulis' | 1904-5 | opera | They Roused Themselves Up - lost |
| 412 | Sfakianaki, Marielli | Greek | The Pagic Muper | 1988 | opera | |
| 413 | Sfakianaki, Marielli | Greek | Minos | 1988 | opera | |
| 414 | Shatin, Judith | American | Job | 1978 | opera-oratorio | |
| 415 | Shatin, Judith | American | Follies and Fancies | 1981-2 | chamber opera | |
| 416 | Silver, Sheila | American | The Thief of Love | 1986 | opera | |
| 417 | Smiley, Pril | American | Elephant steps | 1968 | occult opera | rev. 1981 as Up from Paradise |
| 418 | Smith, Alice Mary | English | Rüdesheim | 1865 | operetta | |
| 419 | Smith, Julia | American | Cynthia Parker | 1938 | opera | rev. 1977 |
| 420 | Smith, Julia | American | The Stranger of Manzano | 1943 | opera | |
| 421 | Smith, Julia | American | The Gooseherd and the Goblin | 1946 | opera | |
| 422 | Smith, Julia | American | Cockcrow | 1953 | opera | |
| 423 | Smith, Julia | American | The Shepherdess and the Chimneysweep | 1963 | opera | |
| 424 | Smith, Julia | American | Daisy | 1973 | opera | |
| 425 | Smyth, Dame Ethel | English | Fantasio | 1892-4 | phantastische Komödie | |
| 426 | Smyth, Dame Ethel | English | Der Wald | 1899 | Musik-Drama | |
| 427 | Smyth, Dame Ethel | English | Les naufrageurs | 1902 | lyrical drama | The Wreckers |
| 428 | Smyth, Dame Ethel | English | The Boatswain's Mate | 1913 | comedy | |
| 429 | Smyth, Dame Ethel | English | Fête galante | 1923 | dance-dream | |
| 430 | Smyth, Dame Ethel | English | Entente cordiale | 1925 | postwar comedy | |
| 431 | Steinberg, Carolyn | American | Cors de chasse | 1990 | chamber opera | |
| 432 | Steiner, Emma Roberto | American | The Burra Pundit | 1907 | light opera | |
| 433 | Steiner, Emma Roberto | American | Fleurette | 1877 | comic opera | |
| 434 | Steiner, Emma Roberto | American | The Man from Paris | 1900 | opéra bouffe | |
| 435 | Stirling, Elizabeth | English | Bleakmoor for Copseleigh | 1819-1895 | chamber opera | unpublished |
| 436 | Stocker, Stella | American | Beulah | 1858-1925 | operetta | |
| 437 | Stocker, Stella | American | Queen of Hearts | | | |
| 438 | Stocker, Stella | American | Ganymede | | | |
| 439 | Stocker, Stella | American | Raoul | | | |
| 440 | Sutherland, Margaret | Australian | The Young Kabbarli | 1965 | opera | |
| 441 | Svanidze, Natela Damianovna | Georgian | Gaul-Gavkhe | 1987 | opera | unperformed |
| 442 | Swain, Freda | English | Second Chance | 1959 | opera | inc |
| 443 | Szonyi, Erzsébet | Hungarian | Dalma | 1953 | opera | |
| 444 | Tailleferre, Germaine | French | Zoulaina | 1930-31 | opéra comique | |
| 445 | Tailleferre, Germaine | French | Le marin du Bolivar | 1937 | opéra bouffe | |
| 446 | Tailleferre, Germaine | French | Dolorès | 1950 | opérette | |
| 447 | Tailleferre, Germaine | French | Il était un petit navire | 1951 | satire lyrique | |
| 448 | Tailleferre, Germaine | French | Parfums | 1951 | comédie musicale | |
| 449 | Tailleferre, Germaine | French | La fille d'opéra | 1955 | opéra bouffe | |
| 450 | Tailleferre, Germaine | French | Le bel ambitieux | 1955 | opéra bouffe | |
| 451 | Tailleferre, Germaine | French | Monsieur Petitpois achète un château | 1955 | opéra bouffe | |
| 452 | Tailleferre, Germaine | French | La pauvre Eugénie | 1955 | opéra bouffe | |
| 453 | Tailleferre, Germaine | French | Mémoires d'une bergère | 1959 | opéra bouffe | |
| 454 | Tailleferre, Germaine | French | Le maître | 1959 | chamber opera | |
| 455 | Tailleferre, Germaine | French | Le petite sirène | 1960 | opéra | |
| 456 | Talma, Louise | American | The Alcestiad | 1962 | opera | |
| 457 | Tate, Phyllis | English | The Lodger | 1960 | opera | |
| 458 | Tate, Phyllis | English | Dark Pilgrimage | 1963 | opera | |
| 459 | Tate, Phyllis | English | The What d'ye Call it | 1966 | opera | |
| 460 | Thys, Pauline-Marie-Elisa | French | | | | operettas, opéra comiques, and operas |
| 461 | Thys, Pauline-Marie-Elisa | French | Nedgeya | 1880 | operetta | |
| 462 | Thys, Pauline-Marie-Elisa | French | Le mariage de Tabarin | 1876 | opera | |
| 463 | Trimble, Joan | Irish | Blind Raftery | 1957 | TV opera | |
| 464 | Tyrrell, Agnes | Czech-Austrian | Bertran de Born | 1846-1883 | opera | unperformed |
| 465 | Uccelli, Carolina | Italian | Saul | 1830 | sacred opera | |
| 466 | Uccelli, Carolina | Italian | Anna di Resburgo | 1832 | melodrama | |
| 467 | Ulehla, Ludmila | American | Sybil of the Revolution | 1993 | chamber opera | |
| 468 | Urreta, Alicia | Mexican | Romance de Doña Balada | 1972 | chamber opera | |
| 469 | Urteaga, Irma | Argentine | La maldolida | 1987 | chamber opera | |
| 470 | Veysberg, Yuliya Lazarevna | Russian | Rusalochka | 1923 | opera | The Little Mermaid |
| 471 | Veysberg, Yuliya Lazarevna | Russian | Gyul'nara | 1935 | opera | |
| 472 | Veysberg, Yuliya Lazarevna | Russian | Myortvaya tsarevna | 1937 | radio opera | The Dead Princess |
| 473 | Veysberg, Yuliya Lazarevna | Russian | Gusi-lebedi | 1937 | children's opera | Geese-Swans |
| 474 | Veysberg, Yuliya Lazarevna | Russian | Zaykin dom | 1937 | children's opera | A Little Rabbit's House |
| 475 | Viardot, Pauline | French | Trop de femmes | 1867 | operetta | |
| 476 | Viardot, Pauline | French | L'ogre | 1868 | operetta | |
| 477 | Viardot, Pauline | French | Le denier sorcier | 1869 | operetta | |
| 478 | Viardot, Pauline | French | Le conte de fées | 1879 | operetta | |
| 479 | Viardot, Pauline | French | Cendrillon | 1904 | opéra comique | |
| 480 | Vieu, Jane | French | Arlette | 1904 | operetta | |
| 481 | Vieu, Jane | French | Madame Tallien, ou Thérésa Cabarrus | 1901 | pièce historique | opera? 8 tableaux |
| 482 | Vieu, Jane | French | La belle au bois dormant | 1902 | féerie illustrée | opera? |
| 483 | Vieu, Jane | French | Aladin | 1904 | féerie chantée | opera? 15 tableaux |
| 484 | Vieu, Jane | French | Sur le pont d'Avignon | 1937 | fantaisie-opérette | |
| 485 | Vieu, Jane | French | Piège d'amour | 1905 | fantaisie-lyrique | |
| 486 | Vito-Devaux, Bertha di | Belgian | La Malibran | 1944 | opéra romantique | |
| 487 | Vito-Devaux, Bertha di | Belgian | Les amants de Sestos | 1949 | drame lyrique | |
| 488 | Vito-Devaux, Bertha di | Belgian | Abigail | 1950-51 | opéra | |
| 489 | Vito-Devaux, Bertha di | Belgian | Magda: 'L'ange dans les ténèbres | 1961 | opéra-ballet | |
| 490 | Vito-Devaux, Bertha di | Belgian | Grétry | 1975 | opéra comique | |
| 491 | Vorlová, Sláva | Czech | Zlaté ptáce | 1949-50 | fairy-tale opera | |
| 492 | Vorlová, Sláva | Czech | Rozmarynka | 1952 | folk opera | |
| 493 | Vorlová, Sláva | Czech | Náchodská kasace | 1955 | historical opera | |
| 494 | Vorlová, Sláva | Czech | Dva svety | 1958 | opera? | Two Worlds |
| 495 | Wallach, Joelle | American | The King's 12 Moons | 1989 | chamber opera | |
| 496 | Wandall, Tekla Griebel | Danish | Don Juan de Marana | 1886 | opera | |
| 497 | Weir, Judith | British | A Night at the Chinese Opera | 1987 | opera | |
| 498 | Weir, Judith | British | The Vanishing Bridegroom | 1990 | opera | |
| 499 | Weir, Judith | British | Blond Eckbert | 1994 | opera | |
| 500 | Whitehead, Gillian | New Zealand | Tristan and Iseult | 1975 | chamber opera | |
| 501 | Whitehead, Gillian | New Zealand | The Tinker's Curse | 1979 | children's opera | |
| 502 | Whitehead, Gillian | New Zealand | The King of the Other Country | 1984 | chamber opera | |
| 503 | Whitehead, Gillian | New Zealand | The Pirate Moon | 1986 | chamber opera | |
| 504 | Whitehead, Gillian | New Zealand | Bride of Fortune | 1988 | chamber opera | |
| 505 | Wikström, Inger | Swedish | Junker Nils av Eka | 1982 | family opera | Junker Nils of Eka |
| 506 | Wikström, Inger | Swedish | Den fredlöse | 1985 | opera | The Outlawed |
| 507 | Wikström, Inger | Swedish | | | | more operas? |
| 508 | Wilhelmina, Princess of Prussia | German | Argenore | 1740 | opera | |
| 509 | Williams, Grace | Welsh | The Parlour | 1961 | opera | |
| 510 | Woolf, (Sophia) Julia | English | Carina | 1889 | comic opera | |
| 511 | Wuiet, Caroline | French | L'heureuse erreur | 1786 | opéra comique | |
| 512 | Wuiet, Caroline | French | L'heureux stratagème, ou Le vol supposé | 1786 | opéra bouffe | |
| 513 | Wurm, Mary J. A. | British | Prinzessin Lisa's Fee | 1890 | Japanese children's opera | |
| 514 | Wurm, Mary J. A. | British | Die Mitschuldigen | 1921 | opera | |
| 515 | Zaimont, Judith Lang | American | Goldilocks and the Three Bears | 1985 | chamber opera | |
| 516 | Zechlin, Ruth | German | Die Salamandrin und die Bildsäule | 1990 | opera | |
| 517 | Zhubaniva, Gaziza Akhmetovna | Kazakh | Enlik-Kebek | 1975 | opera | |
| 518 | Zhubaniva, Gaziza Akhmetovna | Kazakh | Dvadtsat' vosem' | 1987 | opera | Twenty-Eight |
| 519 | Zhubaniva, Gaziza Akhmetovna | Kazakh | Burannïy Edigey | opera | ? | |