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List of String Quartet Composers
A string quartet in performance
This is a list of string quartet composers, chronologically sorted by date of birth and then by surname, whose notability is established by reliable sources. The list is by no means complete. String quartets are written for four string instruments--usually two violins, viola and cello--unless otherwise stated.
Born in the 17th century
Alessandro Scarlatti (1660-1725): Amongst his output of chamber sonatas, he wrote a set of Sonate a quattro per due violini, violetta e violoncello senza cembalo (c. 1715-25).
Georg Philipp Telemann (1681-1767): An example is Sonata á Violino I, Violino II, Viola e Violono in A major TWV 40:200. There is an expanded version for chamber string orchestra.
Born in the 18th century
Born in the 1700s
Giovanni Battista Sammartini (c. 1700-1775): Wrote several quartets though as with many early works for the medium some of these could be played equally by a small string orchestra.
Florian Leopold Gassmann (1729-1774): He is thought to have composed 37 string quartets, including six quartetti published c. 1768 as Op. 1 (H431-6); a set published as Op. 2 (H441-2, 435, 444-6); and a further six published posthumously in 1804 (H451-6).
Born in the 1730s
Antonin Kammel (1730-1784/5): Czech composer who wrote at least two string quartets.
Joseph Haydn (1732-1809): Wrote sixty-eight string quartets (some of which he called Divertimenti), the last incomplete, plus Die Sieben letzten Worte unseres Erlösers am Kreuze (The Seven Last Words of Christ on the Cross), a sequence of eight slow movements plus a brief, rapid, finale (originally written for orchestra, but probably better known in its version for string quartet). He also arranged a set of six preludes and fugues by Gregor Werner for string quartet.
Pierre Vachon (1738-1803): About 30 string quartets including Six Quartettos for two violins, a Tenor and Bass Op. 5 (c. 1775) and Six Quatuors Concertans pour deux Violons, Alto et Basse Op. 11 (1782). 
Ernst Eichner (1740-1777): In addition to flute quartets he wrote a set of six quartets, not for the usual instrument combination of 2 violins, viola, and cello, but for violin, viola, cello and double bass: Sechs Quartette (6 Quartets) Op. 12 (published 1776-77).
Anton Zimmermann (1741-1781): Silesian-born composer who wrote three string quartets.
Václav Pichl (1741-1805): Wrote over thirty quartets; he was one of the founders of the Vienna Violin School.
Antoine-Laurent Baudron (1742-1834): Amongst the first French composers to write string quartets, his Sei quartetti Op. 3 were published in 1768.
Roman Hoffstetter (1742-1815): An Austrian monk and composer, now supposed to have composed the six string quartets known as Haydn's Op. 3, including the well-known 'Serenade Quartet'.
Luigi Boccherini (1743-1805): A prolific composer in most chamber music genres, Boccherini wrote ninety-one string quartets--he also wrote many string quintets.
Giuseppe Cambini (1746-1825): Wrote 149 string quartets and 30 quartets d'airs variés (many of which exist also in versions with winds).Alfred Einstein suggests that Mozart's fourth flute quartet, in his opinion a satirical work, may have been in part a comment on their popularity.
Emanuel Aloys Förster (1748-1823): Six string quartets Op. 7 (c. 1794), six string quartets Op. 16 (c. 1798), three string quartets Op. 21 (1802).
Adalbert Gyrowetz / Vojt?ch Matyá? Jírovec (1763-1850): Friend of Mozart, wrote at least forty-two string quartets (Grove), possibly more than fifty (Hyperion CD notes).
Joseph Leopold Eybler (1765-1846): Friend of Mozart, pupil of Albrechtsberger (who declared him to be the greatest musical genius in Vienna apart from Mozart) and a protégé of Joseph Haydn. Three string quartets, Op. 1, available on CD, written at the age of 22 in 1787 (published in 1794).
Samuel Wesley (1766-1837): At least one quartet (in E♭ major, written around 1810). 
Bernhard Romberg (1767-1841): Eleven complete string quartets, two sets of three quartets each Op. 1 & 25, and single quartets Opp. 12, 37, 39, 59, 60.
Andreas Romberg (1767-1821): Twenty-nine complete string quartets: Three quartets each in Opp. 1, 2, 5, 7, 16, 30, 53, 59 and 76; a single quartet, Op. 40, and a quatuor brilliant, Op. 11. He also wrote three rondos for string quartet, Op. 34.
Born in the 1770s
Ludwig van Beethoven (1770-1827): Sixteen quartets widely regarded as among the finest quartets by any composer. The Große Fuge was originally composed as the last movement of Op. 130, but was subsequently published as a separate work.
Anton Reicha (1770-1836): At least thirty-seven string quartets (14 of them newly discovered), of which the eight Vienna quartets (1801-06) are the most important. Though largely ignored since Reicha's lifetime, they were highly influential works. Groups in Europe have begun programming Reicha's quartets, and first modern editions and first recordings are now in the works. 
Hyacinthe Jadin (1776-1800): Twelve string quartets in four opera, Opp. 1, 2, 3, 4, all in four movements except Op. 4, No. 1. Modeled on Haydn & Mozart; pre-romantic.
Joseph Küffner (1776-1856): At least five string quartets (Op. 41 nos. 1-3, Op. 52, Op. 178)
Johann Nepomuk Hummel (1778-1837): Three string quartets, Op. 30, No. 1 in C major; Op. 30, No. 2 in G major and Op. 30, No. 3 in E♭ major (all c. 1808).
Joachim Nicolas Eggert (1779-1813): Swedish composer who composed at least twelve string quartets including: Three quartets Op. 1 (c. 1807), three quartets Op. 2 (c. 1810) and three quartets Op. 3.
Born in the 1780s
Niccolò Paganini (1782-1840): Fifteen string quartets for violin, viola, guitar and cello, as well as three traditional string quartets.
George Onslow (1784-1853): Thirty-six quartets written between 1810 and 1845.
Ferdinand Ries (1784-1838): Twenty-six string quartets including: Three quartets Op. 70 (1812, 1815) and String Quartet in F minor, WoO. 48 (1833-35).
Louis Spohr (1784-1859): Known as Ludwig in his native Germany, Spohr wrote thirty-six string quartets and four double quartets (for two string quartets).
Franz Berwald (1796-1868): Swedish composer, wrote three string quartets, No. 1 in G minor (1818), No. 2 in A minor (1849), and No. 3 in E♭ major (1849).
Gaetano Donizetti (1797-1848): much better known for his operas, Donizetti also wrote eighteen string quartets, the first sixteen between 1817 and 1821 (mostly 'scholastic works', though the fifth is his most performed), the seventeenth in 1825 and the last in 1836.
Franz Schubert (1797-1828): Traditionally reckoned to have written fifteen string quartets. The Death and the Maiden and Rosamunde quartets are particularly well known.
Franz Lachner (1803-1890): at least six quartets (No. 1 in B minor, Op. 75, No. 2 in A major, Op. 76, No. 4 in D minor, Op. 120, No. 5 in G major, Op. 169, No. 6 in E minor, Op. 173).
Mikhail Glinka (1804-1857): After attempting to compose a quartet in 1824 (a work that remained incomplete), Glinka wrote his only finished string quartet in 1830 While this piece is now seldom performed, it and its incomplete predecessor are notable as among the first attempts by a native Russian composer to work in this genre. **String Quartet in F major" (1830).
Juan Crisóstomo Arriaga (1806-1826): Early 19th-century Spanish composer, born on Mozart's 50th birthday. Wrote three brilliant quartets (c. 1824) before his abrupt death at age 19; No. 1 in D minor; No. 2 in A major; No. 3 in E♭ major.
Václav Jind?ich Veit (1806-1864): Early Romantic Czech composer, a major influence on Smetana, wrote four string quartets and five string quintets.
Ignaz Lachner (1807-1895): Eight quartets (Op. 43 in F; Op. 54 in C; Op. 74 in A; Op. 104 in G; Op. 105 in A minor; Op. 106 in C for 3 violins and viola; Op. 107 in G for four violins; in B♭ Op. posth.)
Felix Mendelssohn (1809-1847): Six numbered string quartets: Op. 12 (1829), Op. 13 (1827), Op. 44 (three quartets, 1838), and Op. 80 (1847); an early unnumbered string quartet in E♭ major (1823); Four Pieces ("Andante", Scherzo, Capriccio, Fugue) for string quartet, Op. 81 (1847); a set of 15 fugues for string quartet, written when Mendelssohn was twelve; and another fugue (in E♭ major) for string quartet, written at age eighteen.
Born in the 1810s
Norbert Burgmüller (1810-1836): Four string quartets: Op. 4 in D minor, Op. 7 in D minor, Op. 9 in A♭ major, and Op. 14 in A minor.
Wilhelm Taubert (1811-1891): At least four string quartets (1848? to 1872?).
Jakob Rosenhain (1813-1894): Three string quartets (Op. 55 in G, Op. 57 in C, Op. 65 in D minor, published by Richault of Paris in 1864; his Am Abend variations for strings Op. 99 has been called in at least one source his 4th string quartet).
Charles Gounod (1818-1893): At least four string quartets: D major, A major, F major, and A minor. The A minor quartet was published in 1893 as his third and received performance in Gounod's lifetime; the remaining three quartets were discovered in manuscript form in 1993.
Henri Vieuxtemps (1820-1881): Three string quartets (in E minor, Op. 44, in C major, Op. 51, in B♭, Op. 52--the latter two published posthumously).
Emilie Mayer (1821-1883): String quartet in G minor, Op. 14 and several in manuscript.
Friedrich Kiel (1821-1885): Two string quartets (Op. 53, in A minor and E♭) and waltzes Op.73 and Op. 78.
Joachim Raff (1822-1882): Nine string quartets, the first (1850) lost/destroyed (the other eight between 1855 and 1874); the last three (all from 1874) share an opus number and were also called suites by the composer.
Karl Goldmark (1830-1915): Goldmark's only string quartet (String Quartet in B♭ major, Op.8, 1860) was his breakthrough work, his first composition to receive very positive reviews in contemporary Viennese musical journals. Long neglected, it was recorded several times in the 1990s as part of a general revival of interest in Goldmark's chamber music.
Josef Rheinberger (1839-1901): Two string quartets, in C minor, Op. 89 and F major, Op. 147.
Friedrich Gernsheim (1839-1916): Five string quartets (No. 1 in C minor, Op. 25 (perf. 1871); No. 2 in A minor, Op. 31 (perf. 1874); No. 3 in F major, Op. 51 (1886); No. 4 in E minor, Op. 66 (perf. 1900); No. 5 in A major, Op. 83 (c. 1911)).
Pyotr Ilyich Tchaikovsky (1840-1893): Three string quartets: No. 1 in D, Op. 11 (1871); No. 2 in F, Op. 22 (1873); and No. 3 in E♭ minor, Op. 30 (1876), of which the first is the best-known, especially the Andante cantabile second movement which has been recorded many times with full string orchestra. There is also a quartet movement in B♭ major from 1865.
Gabriel Fauré (1845-1924): One string quartet, in E minor, Op. 121 (1924).
August Klughardt (1847-1902): Two string quartets (in F, Op. 42 and in D, Op. 61).
Robert Fuchs (1847-1927): Four string quartets: No. 1 in E, Op. 58 (1895); No. 2 in A minor, Op. 62 (1899); No. 3 in C, Op. 71 (1903); No. 4 in A, Op. 106 (1916) (Austrian National Library claims to have a late 5th quartet and several in manuscript predating No. 1).
Nikolay Sokolov (1859-1922): Three string quartets (in F major Op. 7, in A major Op. 14 and in D minor, Op. 20, published 1890, 1892 and 1894) and contributed to projects of the Belyayev circle with Nikolai Rimsky-Korsakov, Alexander Glazunov, Alexander Kopylov and others (including a polka for Les Vendredis for string quartet and other works).
Born in the 1860s
Emil von Reznicek (1860-1945): Four string quartets, including No. 1 in C♯ minor (1921), also in D minor ; pub. Birnbach, 1923, Berlin) and B♭ major (pub. Bimbach, 1932), quartet in C minor (published by E.W. Fritzsch, Leipzig, 1883). (Also fragments, early quartets, alternate versions? The situation is clarified somewhat in the article and some of the manuscripts are now being published).
Hugo Wolf (1860-1903): One string quartet (1884) and a more famous Italian Serenade for string quartet (1892); also, an Intermezzo.
Anton Arensky (1861-1906): Two string quartets, No. 1 (Op. 11) and No. 2 (Op. 35), the latter for violin, viola and two cellos and including the Variations on a Theme of Tchaikovsky, also arranged for string orchestra.
Charles Martin Loeffler (1861-1935): Two string quartets, in A minor (1889), and Music for Four Stringed Instruments (1917).
Claude Debussy (1862-1918): One string quartet, in G minor, Op. 10 (1893).
Carl Nielsen (1865-1931): Four published string quartets, also an early quartet and quartet movements.
Alexander Glazunov (1865-1936): Seven string quartets, and numerous other compositions for string quartet (the Five Pieces of 1879-1881, the Five Novelettes Op. 15, the Finale of the B-la-F Quartet and the first movement Carol-singers of the Name-day Quartet, the Suite Op. 35, the Two Pieces of 1902, and the Elegy for Belyayev Op. 105). The Third Quartet (1888) is often nicknamed the Slav Quartet, while the Seventh Quartet (1930) is subtitled "Homage to the Past".
Robert Kahn (1865-1951): Two string quartets: In A major, Op. 8, and in A minor, Op. 60 (published in 1890 and 1914 respectively).
Jean Sibelius (1865-1957): Four unnumbered string quartets: three from his student years (E♭ major, JS 184, 1885; A minor, JS 183, 1889; and, B♭ major, Op. 4, 1890) and one, Voces intimae (D minor, Op. 56, 1909), from his mature period. Numerous individual pieces for quartet, including Adagio (D minor, JS 12, 1890) and Andante festivo (JS 34a, 1922), are also extant.
Ferruccio Busoni (1866-1924): Two string quartets, Op. 19 in C minor (1884) and Op. 26 in D minor (1887).
Swan Hennessy (1866-1929): Four numbered string quartets (No. 1, Op. 46 ; No. 2, Op. 49 ; No. 3, Op. 61 ; No. 4, Op. 75 ); a Sérénade Op. 65 (1925) for string quartet; and a version for soprano and string quartet (1928) of the Trois Chansons espagnoles Op. 42b (originally with piano, 1921).
Charles Wood (1866-1926): Eight string quartets (1885, 1893, 1912, 1912, 1915, 1916, 1917, and Variations on an Irish Folk Song, 1917), collectively published by Oxford University Press in 1929.
Henry Kimball Hadley (1871-1937): Two string quartets: No. 1 in A, Op. 24, and No. 2, Op. 132 (1932).
Wilhelm Stenhammar (1871-1927): Swedish composer, wrote seven string quartets (but withdrew one quartet, in F minor), and arranged other works for quartet.
Alexander von Zemlinsky (1871-1942) Four string quartets and two movements for string quartet: No. 1 in A major, Op. 4 (1896); No. 2, Op. 15 (1913-15); No. 3, Op. 19 (1924); No. 4 (Suite), Op. 25 (1936); and two movements for string quartet (1927).
Paul Juon (1872-1940): Four string quartets: A youthful Op. 5 and three acknowledged quartets Op. 11 in B minor, Op. 29 in A minor and Op. 67 in C major.
Ralph Vaughan Williams (1872-1958): Two numbered string quartets: No. 1 in G minor (1908, rev. 1921) and No. 2 in A minor (1942/3). Also one student work in C minor (1897)
Sergei Rachmaninoff (1873-1943): Two early quartets, both never finished: No. 1 (c. 1890) and No. 2 (c. 1896).
Max Reger (1873-1916): Six string quartets (including an early posthumously-published work with an optional part for double bass).
Reynaldo Hahn (1874-1947): At least two string quartets (A minor from 1939, F major from 1943).
Charles Ives (1874-1954): Two string quartets (1896 and 1913), the first entitled From the Salvation Army.
Franz Schmidt (1874-1939): Quartet No. 1 in A major (1925), Quartet No. 2 in G major (1929).
Josef Suk (1874-1935): Two string quartets--in B♭, Op. 11 from 1896, and Op. 31 in one movement from 1911, tonal but from G minor -> D♭. Also the Meditation on the Old Czech Chorale St. Wenceslas, Op. 35a, 1914.
Erkki Melartin (1875-1937): Four quartets, in E minor (1896), G minor (1900), E♭ major (1902) and in F major (1910).
Maurice Ravel (1875-1937): One string quartet, in F major (1903).
Wilhelm Paul Richter [ro] (1875-1950): At least three string quartets: Op. 98 in C minor, Op. 99 in D minor and Op. 122 in E major. No. 2, Op. 99 was composed in 1937. All 3 published by Frieder Latzina-Verlag of Karlsruhe in 2001-2002.
Richard Wetz (1875-1935): Two string quartets: in F minor, Op. 43, in E minor, Op. 49.
Erno Dohnányi (1877-1960): Three string quartets (1899, 1906, 1926).
Joseph Holbrooke (1878-1958): Six string quartets (No. 1 Op. 17b Fantasie-Quartet (1904, pub.1922), No. 2 War Impressions Op. 58a pub. 1915, No. 3 Pickwick Club Op. 68 pub. 1916, No. 4 Folksong Suite Op. 71 c. 1916, No. 5 Folksong Suite No. 2 Op. 72 c. 1917, No. 6 Folksong Suite No. 3 Op.73 c. 1918) and a further Suite No. 1 Cambria Op. 101.
Frank Bridge (1879-1941): Five string quartets: B♭ major (1901); No. 1 in E minor ('Bologna') (1906); No. 2 in G minor (1915); No. 3 (1926); No. 4 (1937), plus a host of other, shorter pieces.
John Ireland (1879-1962): Two string quartets: D minor (1895-1897?, scholarship work, RCM) and C minor (1897?, composed as a student work at the R.C.M.), both published only c. 1973.
Ottorino Respighi (1879-1936): Seven or eight string quartets or works for quartet (one with an unusual instrumentation): D major (1898), Cortège (1898), B♭ major (1898), D♭ major (1903) (incomplete?), D major (1904), in D major for quinton, viola d'amore, viola da gamba, viola da basso (1904), D minor (1909) and Quartetto Dorico (1924).
Born in the 1880s
Ernest Bloch (1880-1959): Six string quartets (in G (1896) and five numbered quartets - 1916, 1945, 1952, 1953, 1956; individual shorter works e.g. In the Mountains (1924), Prelude (1925), Night (1923), 2 Pieces (1938, 1950), Paysages (1923)).
Karl Weigl (1881-1949): Eight string quartets: No. 1 in C minor (1903 or 1905); No. 2 in E (with viola d'amore) (1906); No. 3 in A major (1909); No. 4 in D minor (1924); No. 5 in G major (1933); No. 6 in C (1939); No. 7 in F minor (1942); No. 8 in D (1949)
Anton Webern (1883-1945): His String Quartet is composed using the twelve-tone technique. His Five Movements, Op. 5 (1909) and Six Bagatelles, Op. 9 (1911-13) are also significant in SQ literature. Plus, a string quartet, a slow movement and a rondo from 1905
Arthur Lourié (1892-1966): Three quartets: No. 1 (1915), No. 2 (1923) and No. 3 Suite (1924).
Alois Hába (1893-1973): Sixteen quartets, employing various microtonal systems (e.g. No. 11 uses a sixth-tone system; No. 12, quarter-tone; No. 16, fifth-tone).
Rued Langgaard (1893-1952): Six numbered quartets, as well as a set of variations (BVN 71, 1914, r. 1931), the Italian Scherzo (BVN 408, 1950), the (unnumbered) String Quartet in A-flat major (BVN 155, 1918), and Rosengaardsspil (Rose Garden Play; BVN 153, 1918).
Paul Dessau (1894-1979): Seven string quartets (No. 1 before 1943 and published 1969?, No. 2 in 1942/43, No. 3 in 1943-46, No. 4 Barbaraquartett (or 99 Bars for Barbara),, No. 5 Quartettino (Felsenstein-Quartett) in 1955, No. 6 Sieben Sätze für Streichquartett in 1974, No. 7 in 1975. Also a string quartet movement in 1957.
Hans Erich Apostel (1901-1972): Two mature numbered quartets (1935, 1956) and other works for string quartet (early quartets from 1925 and 1926; 6 Epigrams, Op.33 from 1962).
Emil Hlobil (1901-1987): At least five string quartets (at least 3 published: No. 2, Op. 15, (1935-36); No. 3, Op. 50 (1955); No. 5, Op. 81 (1971)
Edmund Rubbra (1901-1986): Four string quartets (No. 1 in F minor, Op. 35, 1933 revised 1946; No. 2 in E♭ Op. 73, 1951; No. 3, Op. 112, 1963; No. 4, Op. 150, 1977; dates from the notes to the Sterling Quartet cycle on Conifer).
Gra?yna Bacewicz (1909-1969): Seven string quartets, the first two only recently published and recorded (the others from 1947 to 1965).
Vagn Holmboe (1909-1996): Twenty-one numbered quartets, the last of which (Quartetto sereno, Op. 197, 1996) was completed by Per Nørgård. Also extant is a handful of 'lettered' quartets (in various degrees of completion), a quartet arrangement ofSværm (Swarm, Op. 190b, 1996; originally for two violins), and the Concerto for String Quartet (Op. 195, 1996; includes orchestra), Holmboe's last completed work.
Born in the 1910s
Josef Tal (1910-2008) Three string quartets (1954, 1963, 1976).
Samuel Barber (1910-1981): One string quartet (B minor, Op. 11, 1936-43), from which the Adagio for Strings was orchestrated, as well as a Serenade (Op. 1, 1928; arranged for strings in 1944) and Dover Beach (Op. 3, 1931; includes baritone soloist); a second quartet, commissioned in 1947, never progressed beyond early sketches.
Alan Hovhaness (1911-2000): American composer of Armenian heritage wrote 4 string quartets, recorded by the Shanghai Quartet amongst others.
Arkady Filippenko (1912-1983): Ukrainian composer who wrote three string quartets; No. 1 in A minor, No. 2 in D major, No. 3 in G major. String quartet No. 2 was awarded the U.S.S.R. State Prize in 1948.
John Cage (1912-1992): String Quartet in Four Parts (1950), Thirty Pieces for String Quartet (1983), Music for Four (the quartet parts extracted from his Music for...) (1987-1988), Four (1989).
Conlon Nancarrow (1912-1997): Three string quartets (1945, c. 1948, 1987); second incomplete.
Benjamin Britten (1913-1976): Three numbered string quartets (1941, 1945 and 1975) plus two early unnumbered ones (1928 and 1931) and a number of other works for string quartet (such as the three Divertimenti, 1933).
Iannis Xenakis (1922-2001): Four works for string quartet: "st/4--1,080262" (1955-1962), which was written with the help of an IBM 7090 computer using stochastic algorithms, Tetras (1983), a work in nine sections, Tetora (1990), and Ergma (1994).
Veniamin Basner (1925-1996): Five string quartets: No. 1 Op. 1 (1948) in one movement; No. 2 Op. 5 (1953), a piece in three movements; No. 3 Op. 9 (1960), in four movements; No. 4 Op. 18 (1969), in three movements; and No. 5 Op. 24 (1975), in two movements.
Pierre Boulez (1925-2016): Livre pour quatuor (1949) withdrawn, recasting some parts later as Livre pour cordes; lately, ensembles have been showing interest in the work as a whole, with Parts I, II, III, V and VI recorded recently.
Bertold Hummel (1925-2002): String Quartet No. 1, Op. 3 (1951); String Quartet No. 2, Op. 46 (1972); 8 FRAGMENTS from Letters of Vincent van Gogh for Baritone and String Quartet, Op. 84 (1985); Concertante Music for Guitar and String Quartet, Op. 89a (1989).
Ben Johnston (1926-2019): Ten string quartets: No 1 Nine Variations (1959); No 2 (1964); No 3 Vergings (1966); No 4 Amazing Grace (1973); No 5 (1979); No 6 (1980); No 7 (1984); No 8 (1984-86); No 9 (1987-88); and No 10 (1995). String Quartets Nos 3 and 4 may be performed together as Crossings.
György Kurtág (born 1926): String Quartet, Op. 1, Hommage à Mihály András (12 Microludes), Op. 13, Officium breve in memorium Andreae Szervánszky, Op. 28, 6 Moments musicaux Op 44 (2005); plus, the shorter works Aus der Ferne III (1991), Aus der Ferne V (1999), Hommage à Jacob Obrecht (2004-2005), Arioso - Hommage à Walter Levin 85 (2009).
George Crumb (born 1929): String Quartet, and Black Angels (Images I), for electric string quartet.
Peter Sculthorpe (1929-2014): Eighteen string quartets, of which the first five are considered lost, although isolated movements have been performed and recorded; the twelfth, fourteenth, sixteenth, and eighteenth quartets include optional parts for didgeridu; the thirteenth includes soprano voice.
Ib Nørholm (born 1931): At least nine, No. 1 from 1954 to No. 9, his Op. 137, in 1994 
James Douglas (born 1932): British Composer of 15 string quartets.
Pelle Gudmundsen-Holmgreen (1932-2016): Fourteen quartets; the tenth and eleventh also have optional vocal ensemble parts; the twelfth, thirteenth and fourteenth quartets were designed to be played individually, or any two or all three simultaneously; also the Concerto Grosso for string quartet and instrument ensemble (1990/2006).
Henryk Górecki (1933-2010): String Quartet No. 1 ("Already It Is Dusk"), Op. 62, String Quartet No. 2 ("Quasi una Fantasia"), Op. 64; String Quartet No. 3 (Piesni Spiewaja, "...songs are sung"), Op. 67.
Krzysztof Penderecki (born 1933): Three string quartets (1960, 1968, 2008); Der Unterbrochene Gedanke (1984).
R. Murray Schafer (born 1933): Thirteen string quartets, as of 2015; the seventh quartet includes a soprano part, the fourth and ninth include tape parts. Diagnosed with Alzheimer's Disease in 2015, Schafer composed the brief String Quartet No. 13, which he subtitled 'Alzheimer's Masterpiece', for the Quatuor Molinari.
Harrison Birtwistle (born 1934): Nine Movements for String Quartet (1991-96), String Quartet: The Tree of Strings (2007); Hoquetus Irvinus (2013)(short work for the Arditti Quartet's fortieth anniversary); String Quartet No 3: The Silk House Sequences (2015).
Peter Maxwell Davies (1934-2016): String Quartet in One Movement (1961); a few other shorter works; Maxwell Davies was commissioned by Naxos Records to compose ten string quartets, completed in 2007. The recordings are performed by the Maggini Quartet.
Jan Klusák (born 1934): Composed 6 string quartets to date, the first 5 in 1955-56, 1961-62, 1975, 1990, and 1994 and the most recent in 2003.
Roger Reynolds (born 1934): Tetra, Coconino . . . A Shattered Landscape (1985; rev. 1993),Visions (1991), Ariadne's Thread, with computer (1994).
Alfred Schnittke (1934-1998): Four string quartets; also, Canon in Memoriam Igor Stravinsky and Variations for string quartet.
Christian Wolff (born 1934): Summer (1960); Lines (1972); String Quartet Exercises Out of Songs (1974-76); For E.C. (2003); for two violinists, violist and 'cellist (2008).
Terry Riley (born 1935): String Quartet (1960); returned to pre-composed notated music at the request of the Kronos Quartet in the 1970s: G Song; Sunrise of the Planetary Dream Collector; Cadenza on the Night Plain; Mythic Birds Waltz; Salome Dances for Peace; Requiem for Adam; The Sands for string quartet and orchestra; The Cusp of Magic for string quartet, pipa and assorted toys; Sun Rings for string quartet, choir and backing track of sounds recorded by NASA in space, to name but a few.
Peter Schickele (born 1935): Five string quartets, two quintets with piano.
La Monte Young (born 1935): On Remembering a Naiad (Five small pieces)(1956); Chronos Kristalla (Time Crystals) (1990), where the quartet's strings are tuned to Just intonation, natural harmonics are played throughout, and the performance lasts about ninety minutes.
Iván Eröd (born 1936): Three quartets: Op. 18 (1975), Op. 26 (1978), Op. 78 (2003). Numbers 2 and 3 recorded by the ALEA Ensemble.
Steve Reich (born 1936): Different Trains (1988), for string quartet and tape; Triple Quartet (1998), which may be performed by one quartet (with tape), three quartets, or a 36 piece orchestra; and WTC 9/11 (2009-10), for string quartet and tape.
Herbert Blendinger (born 1936): Four quartets: Op. 11 (1957), Op. 19 (1969), Op. 29 (1976), Op. 54 (1990) - numbers 2, 3 and 4 have been recorded by the ALEA Ensemble.
Philip Glass (born 1937): Three string quartets as a student, eight mature string quartets (1966, 1983, 1985, 1989, 1991, 2013, 2014, 2018), music for string quartet for the 1931 film Dracula (1998), and the suite from Bent (2009).
Valentin Silvestrov (born 1937): Three quartets (1974, 1988, 2011), plus Quartetto Piccolo (1961).
Bart Berman (born 1938): String quartet (1958); Four Melodies for string quartet (1994).
Leo Brouwer (born 1939): Cuban composer, has written five quartets: String Quartet No. 1 "Homage to Béla Bartók" (1961), Rem Tene Verba Sequentur (1969), String Quartet No. 3 (1997), String Quartet No. 4 "Rem tene verba sequentur II" (2007), and String Quartet No. 5 (2011).
Harold Badger (born 1930) Australian composer. He composed his first string quartet in 1960. It was premiered in his presence by the Paul McDermott String Quartet at the University of Melbourne on April 5, 1960.
Julio Estrada (born 1943): "Canto mnémico" (1973, rev. 1983), ishini'ioni (1984-1990) and "Quotidianus", with voice (2006).
Brian Ferneyhough (born 1943): Sonatas for String Quartet (1967), String Quartets Nos. 2-6; the fourth includes a part for a soprano; also, Adagissimo (1983), Dum Transisset I-IV (2007), "Exordium - Elliotti Carteri in honorum centarii" (2008), Silentium (2014).
Paul Lansky (born 1944): String Quartet No. 1 (1967), String Quartet No. 2 (1971-1978), Ricercare (2000).
Michael Nyman (born 1944): Five string quartets, plus a few smaller pieces.
John Tavener (1944-2013): Four string quartets: The Hidden Treasure - String Quartet No. 1; The Last Sleep of the Virgin - String Quartet No. 2, for string quartet and handbells; Diódia - String Quartet No. 3; The Bridegroom - String Quartet No. 4; plus other works including parts for string quartet.
Dave Smith (born 1949): Six string quartets: No. 1 Cuban quartet (1990/2014); No. 2 Natural selections (2009/10); No. 3 African mosaic (2014); No. 4 After Albania (2014); No. 5 All this and less (2014); No. 6 The myth of Sisyphus (2014)
Kevin Volans (born 1949): twelve string quartets, plus a short quartet movement.
Kaija Saariaho (born 1952): Nymphea (Jardin Secret III) (1987) for string quartet and live electronics, Terra Memorium (2012).
John Luther Adams (born 1953): Five works: The Wind in High Places (2011); Dream of the Canyon Wren (2013); untouched (2015); Canticles of the Sky (2015); Everything That Rises (2017)
Georg Friedrich Haas (born 1953): Ten quartets, plus the short LAIR, written for the Arditti Quartet's fortieth anniversary. Quartets 3, 9, and 10 were meant to be performed in absolute darkness.
John Zorn (born 1953): Forbidden Fruit for voice, string quartet & turntables (1987), Cat o' Nine Tails (or, Tex Avery Directs the Marquis de Sade) (1988), The Dead Man (1990), Memento Mori (1992), Kol Nidre (1996), Necronomicon (2003), The Alchemist (2011); Pandora's Box (2014)(includes soprano part), The Remedy of Fortune (2015).
Jorge Grundman (born 1961): Fragment for String Quartet (2004), Surviving a Son's Suicide (2009), God's Sketches for String Quartet, Soprano and Mallets (2012), On Blondes and Detectives. Cliché Music for String Quartet (2012), A Mortuis Resurgere: The Resurrection of Chris for Soprano and String Quartet (2013) and The Propagation of Faith (2014).
David Flynn (born 1977): Irish composer, three string quartets to date. String Quartet No. 1 "Fairground Attractions" (2003), String Quartet No. 2 "The Cranning" (2004-2005), String Quartet No. 3 "The Keening" (2007), Flynn received the 2004 Huddersfield Contemporary Music Festival Composers Award for "Slip" the first movement of Quartet No. 2.
Jimmy Lopez (born 1978): Peruvian composer, string quartet "La Caresse du Couteau" (2004).
Joseph Hallman (born 1979): Philadelphia composer, many string quartets for multiple groups, including "the not-so-magnificent cadaver", "musings", and "compliments". Also notable are his transcriptions of contemporary pop songs for gospel singer and string quartet.
Dinesh Subasinghe (born 1979): Sri Lankan composer, string quartet "Night Before the Battle" (2011).
Born in the 1980s
Richard Zarou (born 1981): American composer, String Quartet "Retreating From the Light" (2003).
Mohammed Fairouz (born 1985): American composer. Lamentation and Satire (2008), Chorale Fantasy (2010) and The Named Angels (2012).
^Note re Martin?'s quartets: no.1 is very slightly incomplete (the score shows a completion of the very last bars was needed), while a 1917 quartet "H. 103", once thought lost, has proved possible to reconstruct.
^Apostel's complete output for string quartet has been recorded, along with some relevant interviews, on a several-CD set on the Cybele label; there are some other such sets on that label devoted to the quartet output of other composers of the period, taking a similar approach.