String Quartet No. 12

String Quartet No. 12 may refer to:


 * String Quartet No. 12 (Beethoven) by Ludwig van Beethoven
 * String Quartet No. 12 (Dvořák), American by Antonín Dvořák
 * String Quartet No. 12 (Hill) by Alfred Hill
 * String Quartet No. 12 (Maconchy) by Elizabeth Maconchy
 * String Quartet No. 12 (Milhaud), Op. 252, by Darius Milhaud
 * String Quartet No. 12 (Mozart) by Wolfgang Amadeus Mozart
 * String Quartet No. 12 (Schubert) by Franz Schubert
 * String Quartet No. 12 (Shostakovich) by Dmitri Shostakovich
 * String Quartet No. 12 (Spohr) by Louis Spohr
 * String Quartet No. 12 (Villa-Lobos) by Heitor Villa-Lobos