String Quartet in A major may refer to: No. 6 of the String Quartets, Op. 20 (Haydn) String Quartet No. 9 (Mozart) String Quartet No. 18 (Mozart) String Quartet No. 5 (Beethoven) String Quartet No. 19 (Spohr) String Quartet No. 30 (Spohr) String Quartet No. 1 (Dvořák) String Quartet in A major (Bliss) String Quartet No. 2 (Shostakovich) String Quartet No. 7 (Hill) String Quartet No. 8 (Hill)