String Quartet in E-flat major may refer to: No. 1 of the String Quartets, Op. 20 (Haydn) No. 2 of the String Quartets, Op. 33 (Haydn) No. 3 of the String Quartets, Op. 50 (Haydn) No. 6 of the String Quartets, Op. 64 (Haydn) No. 6 of the String Quartets, Op. 76 (Haydn) String Quartet in E-flat major (Wanhal) String Quartet No. 7 (Mozart) String Quartet No. 11 (Mozart) String Quartet No. 16 (Mozart) String Quartet No. 10 (Beethoven) String Quartet No. 12 (Beethoven) String Quartet No. 10 (Schubert) String Quartet in E-flat major (1823) (Mendelssohn) String Quartet No. 1 (Mendelssohn) String Quartet No. 5 (Mendelssohn) String Quartet No. 10 (Dvořák) String Quartet (Manrique de Lara) String Quartet in E-flat major (Sibelius) String Quartet No. 3 (Nielsen) String Quartet No. 5 (Hill) String Quartet No. 1 (Enescu) String Quartet No. 9 (Shostakovich) Quartet Movement in E-flat major (Shostakovich)