String Quartet in A major

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)