This is an incomplete list of authors who have written libretti for operas. Only librettists with their own articles in Wikipedia are listed. The name of the composer of each opera is also given.
List of operas by librettist's last name
A Giuseppe Adami (1878–1946) for Giacomo Puccini: La rondine, Il tabarro, Turandot (with Renato Simoni) for Riccardo Zandonai: La via della finestra for Franco Vittadini: Anima allegra, Nazareth
Jules Adenis (1823–1900) with Henri Caïn for Umberto Giordano: Marcella with Charles Grandvallet for Jules Massenet: La grand'tante with (1821–1876) for Jacques Offenbach: Un postillon en gage with J Rostaing for Ernest Guiraud: Sylvie with Jules-Henri Vernoy de Saint-Georges for Georges Bizet: La jolie fille de Perth with A Silvestre and L Bonnemère for Henry Charles Litolff: Les templiers
Franco Alfano (1875–1954) for his own music: Sakùntala
Louis Anseaume (1721–1784) alone for Egidio Duni: L'école de la jeunesse, Le peintre amoureux de son modèle for Christoph Willibald Gluck: L'île de Merlin, ou Le monde renversé, L'ivrogne corrigé for André Grétry: Le tableau parlant with Thomas Hales for André Grétry: Le jugement de Midas with Pierre-Augustin Lefèvre de Marcouville: for Christoph Willibald Gluck: La fausse esclave for Jean Louis Laruette: La fausse aventurière for Pieter van Maldere: Le Médecin de l'amour
George Antheil (1900–1959) for his own music: Transatlantic
Guillaume Apollinaire (1880–1918) used by Francis Poulenc: Les mamelles de Tirésias
W. H. Auden (1907–1973) alone: for Benjamin Britten: Paul Bunyan with Chester Kallman (1921–1975) for Hans Werner Henze: The Bassarids, Elegy for Young Lovers for Nicolas Nabokov: Love's Labour's Lost for Igor Stravinsky: The Rake's Progress
B Ingeborg Bachmann (1926–1973) for Hans Werner Henze: Der junge Lord, Der Prinz von Homburg
Philipp Georg Bader for Joseph Haydn: Didone Abbandonata (Dido) (lost), Die bestrafte Rachbegierde (lost)
Carlo Francesco Badini for Joseph Haydn: L'anima del filosofo, ossia Orfeo ed Euridice
Béla Balázs (1884–1949) for Béla Bartók: Bluebeard's Castle
Luigi Balocchi (1766–1832) for Gioachino Rossini: Il viaggio a Reims, Le siège de Corinthe (with Alexandre Soumet), Moïse et Pharaon (with Étienne de Jouy)
Henri Auguste Barbier (1805–1882) for Hector Berlioz: Benvenuto Cellini (with Léon Wailly)
Jules Barbier (1825–1901) alone: for Jacques Offenbach: The Tales of Hoffmann for Camille Saint-Saëns: Le timbre d'argent with Michel Carré: for Charles Gounod: La colombe, Faust, Le médecin malgré lui, Philémon et Baucis, Polyeucte, La reine de Saba, Roméo et Juliette for Giacomo Meyerbeer: Le pardon de Ploermel for Ambroise Thomas: Mignon, Hamlet, Françoise de Rimini
Pierre Beaumarchais (1732–1799) used by Antonio Salieri: Tarare
Vladimir Belsky (1866–1946) for Nikolai Rimsky-Korsakov: Sadko (in part), The Tale of Tsar Saltan, The Legend of the Invisible City of Kitezh and the Maiden Fevroniya, The Golden Cockerel
Sem Benelli (1877–1949) for Umberto Giordano: La cena delle beffe for Italo Montemezzi: L'amore dei tre re, L'incantesimo
Hector Berlioz (1803–1869) for his own music: Les Troyens, Béatrice et Bénédict
Giovanni Bertati (1735–1815) for Domenico Cimarosa: Il matrimonio segreto for Giuseppe Gazzaniga: Don Giovanni Tenorio
Thomas Betterton (1635–1710) for Henry Purcell: Dioclesian, The Fairy-Queen (probably)
Robin Blaser (1925–2009) for Harrison Birtwistle: The Last Supper
Édouard Blau (1836–1906) alone: for Édouard Lalo: Le roi d'Ys with Georges Hartmann and Paul Milliet: for Jules Massenet: Werther with Adolphe d'Ennery and Louis Gallet: for Jules Massenet:Le Cid
Arrigo Boito (1842–1918) for Giuseppe Verdi: Simon Boccanegra (revised version), Otello, Falstaff for Amilcare Ponchielli: La Gioconda (writing under the pseudonym/anagram Tobia Gorrio) for his own music: Mefistofele, Nerone for Franco Faccio: Amleto
Jean-Nicolas Bouilly (1763–1842) for Luigi Cherubini: Les deux journées for André Grétry: Pierre le Grand for Étienne Méhul: Le jeune Henri, Une folie, Héléna, Valentine de Milan,
Bertolt Brecht (1898–1956) for Paul Dessau: Die Verurteilung des Lukullus for Kurt Weill: alone: Der Jasager, Rise and Fall of the City of Mahagonny, with Elisabeth Hauptmann: Happy End, The Threepenny Opera
Georg Büchner (1813–1837) used by Alban Berg: Wozzeck
Francis Burnand (1836–1917) for Arthur Sullivan: The Chieftain, The Contrabandista, Cox and Box for Edward Solomon: Domestic Economy, Pickwick, The Tiger
Giovanni Francesco Busenello (1598–1659) for Claudio Monteverdi: L'incoronazione di Poppea for Francesco Cavalli: Gli amori d'Apollo e di Dafne, La Didone, La prosperita di Giulio Cesare dittatore , Statira principessa de Persia
Ferruccio Busoni (1866–1924) for his own music: Arlecchino, Die Brautwahl, Doktor Faust, Turandot
C Massimo Cacciari (born 1944) for Luigi Nono: Prometeo
Louis de Cahusac (1706–1759) for Jean-Philippe Rameau: Anacréon (first Rameau opera by that name), Les Boréades, Les fêtes de l'Hymen et de l'Amour, Naïs, La naissance d'Osiris, Zaïs, Zoroastre
Henri Caïn (1859–1937) alone: for Jules Massenet: Cendrillon, La Navarraise, Don Quichotte, Roma, Sapho for Franco Alfano: Cyrano di Bergerac with de Croisset – see Francis de Croisset
Italo Calvino (1923–1985) for Luciano Berio: La vera storia, Un re in ascolto
Ranieri de' Calzabigi (1714–1795) for Christoph Willibald Gluck: Alceste, Orfeo ed Euridice, Paride ed Elena
Salvadore Cammarano (1801–1852) for Gaetano Donizetti: L'assedio di Calais, Belisario, Lucia di Lammermoor, Maria de Rudenz, Maria di Rohan, Pia de' Tolomei, Poliuto, Roberto Devereux for Giuseppe Verdi: Alzira, La battaglia di Legnano, Luisa Miller, Il trovatore (with Leone Emanuele Bardare) for Giuseppe Persiani: Ines de Castro for Saverio Mercadante: Elena da Feltre, La vestale, Orazi e Curiazi, Virginia, Il reggente for Giovanni Pacini: Saffo
Mark Campbell for Mason Bates: The (R)evolution of Steve Jobs for Iain Bell: Stonewall for William Bolcom: Lucrezia, Dinner At Eight for Julian Grant: The Nefarious, Immoral but Highly Profitable Enterprise of Mr. Burke & Mr. Hare for Laura Kaminsky: As One, Some Light Emerges, Today It Rains for Paul Moravec: The Shining for John Musto: Volpone, Later the Same Evening, Bastianello, The Inspector for Rene Orth: Empty the House for Roberto Scarcella Perino: A Sweet Silence in Cremona for Paola Prestini: Edward Tulane for Kevin Puts: Silent Night, The Manchurian Candidate, Elizabeth Cree for Stewart Wallace: Supermax
Michel Carré (1821–1872) alone: for Charles Gounod: Mireille for Jacques Offenbach: La rose de Saint-Flour with Eugène Cormon: for Georges Bizet: Les pêcheurs de perles with Barbier – see Jules Barbier
Nick Cave (born 1957) for Nicholas Lens: Shell Shock
Ernest Chausson (1855–1899) for his own music: Le roi Arthus
Helmina von Chézy (1783–1856) for Carl Maria von Weber: Euryanthe
Henry Fothergill Chorley (1808–1872) for Arthur Sullivan: The Sapphire Necklace for William Vincent Wallace: The Amber Witch
Vittorio Amedeo Cigna-Santi (around 1730-after 1795) for Mozart: Mitridate, re di Ponto
Guelfo Civinini (1873–1954) for Giacomo Puccini: La fanciulla del West (with Carlo Zangarini)
Jean Cocteau (1889–1963) for Arthur Honegger: Antigone for Darius Milhaud: Le pauvre matelot for Francis Poulenc: La voix humaine for Igor Stravinsky: Oedipus rex
J. M. Coetzee (born 1940) for Nicholas Lens: Slow Man
Colette (1873–1954) for Maurice Ravel: L'enfant et les sortilèges
Marco Coltellini (1719–1777) for Christoph Willibald Gluck: Telemaco for Hasse: Piramo e Tisbe for Joseph Haydn: L'infedeltà delusa for Wolfgang Amadeus Mozart: La finta semplice (after Goldoni) for Antonio Salieri: Armida for Tommaso Traetta: Ifigenia in Aulide, Antigona
Jeremy Commons (born 1933) with Ivan Bootham: The Death of Venus
William Congreve (1670–1729) used by John Eccles: Semele used by George Frideric Handel: Semele used by John Eccles, Daniel Purcell, Gottfried Finger and John Weldon: The Judgement of Paris
Eugène Cormon (1810–1903) with Michel Carré for Georges Bizet: Les pêcheurs de perles with Hector-Jonathan Crémieux for Jacques Offenbach: Robinson Crusoé with Lockroy for Aimé Maillart: Les dragons de Villars
Thomas Corneille (1625–1709) for Marc-Antoine Charpentier: Médée for Jean-Baptiste Lully: Bellérophon (with Bernard Le Bovier de Fontenelle)
Hector-Jonathan Crémieux (1828–1892) with E About for Jacques Offenbach: Le financier et le savetier with Ernest Blum for Jacques Offenbach: Bagatelle, La jolie parfumeuse with Eugène Cormon for Jacques Offenbach: Robinson Crusoé with Philippe Gille for Jacques Offenbach: Les bergers with Ludovic Halévy for Léo Delibes: Les eaux d’Ems for Jacques Offenbach: La chanson de Fortunio, Jacqueline, Orphée aux enfers, Le pont des soupirs, Le roman comique with Ludovic Halévy, M de Saint-Rémy and Ernest Lépine for Jacques Offenbach: M. Choufleuri restera chez lui le . . . with Adolphe Jaime for Hervé: Le petit Faust for Jacques Offenbach: Une demoiselle en loterie with Adolphe Jaime and Etienne Tréfeu for Jacques Offenbach: Geneviève de Brabant with Albert de Saint-Albin for Jacques Offenbach: La foire Saint-Laurent
Michael Cristofer (born 1945) for Terence Blanchard: Champion
Francis de Croisset (1877–1937) alone: for Reynaldo Hahn: Ciboulette with Henri Caïn for Jules Massenet: Chérubin
Eric Crozier (1914–1994) for Benjamin Britten: Albert Herring, Billy Budd (with E. M. Forster), The Little Sweep
César Cui (1835–1918) for his own music: The Captain's Daughter, A Feast in Time of Plague, Mademoiselle Fifi, The Saracen (with Vladimir Vasilievich Stasov)
D Gabriele D'Annunzio (1863–1938) for Pietro Mascagni: Parisina for Alberto Franchetti: La figlia di Iorio
Lorenzo Da Ponte (1749–1838) for Wolfgang Amadeus Mozart: The Marriage of Figaro, Don Giovanni, Così fan tutte for Vicente Martín y Soler: L'arbore di Diana, Il burbero di buon cuore, Una cosa rara for Antonio Salieri: Axur, re d'Ormus
William Davenant (1606–1668) for Henry Lawes, Matthew Locke and others: The Siege of Rhodes
Giovanni de Gamerra (1742–1803) for Wolfgang Amadeus Mozart: Lucio Silla (revised by Metastasio); Italian adaptation of The Magic Flute for Giuseppe Sarti: Medonte, re di Epiro for Josef Mysliveček: Il Medonte for Antonio Salieri: Palmira, regina di Persia
Constance DeJong (born 1950) for Philip Glass: Satyagraha
Casimir Delavigne
Germain Delavigne
Frederick Delius (1862–1934) for his own music: Fennimore and Gerda, Irmelin, A Village Romeo and Juliet
Philippe Néricault Destouches (1680–1754) for Jean-Joseph Mouret: Les amours de Ragonde
Eduard Devrient (1801–1877) for Heinrich Marschner: Hans Heiling
Gaetano Donizetti (1797–1848) for his own music: Betly, Il campanello di notte, Le convenienze ed inconvenienze teatrali, Don Pasquale (with Giovanni Ruffini)
John Dryden (1631–1700) for Henry Purcell: The Indian Queen (with Robert Howard), King Arthur for Louis Grabu: Albion and Albanius
E
Gottfried von Einem (1918–1996) for his own music: Dantons Tod (with Boris Blacher)
Adolphe d'Ennery (1811–1899) alone: for Charles Gounod: Le tribut de Zamora with Édouard Blau and Louis Gallet: for Jules Massenet: Le Cid with Jules Brésil for Adolphe Adam: Si j'étais roi with Philippe François Pinel Dumanoir and Jules Chantepie: for Jules Massenet: Don César de Bazan
Victor Erofeyev (born 1947) for Alfred Schnittke: Life with an Idiot
Hanns Heinz Ewers (1871–1943) for Eugen d'Albert: Die toten Augen
F Mohammed Fairouz (born 1985)
for himself: Sumeida's Song Duncan Fallowell (born 1948) for Irmin Schmidt composer Gormenghast (opera) Charles-Simon Favart (1710–1792) for Egidio Duni: La fée Urgèle, ou Ce qui plaît aux dames Lorenzo Ferrero (born 1951) for himself: Marilyn, Night, La nascita di Orfeo, La Conquista Jacopo Ferretti (1784–1852)