String Quartet No. 15

String Quartet No. 15 may refer to:


 * String Quartet No. 15 (Beethoven) by Ludwig van Beethoven
 * String Quartet No. 15 (Hill) by Alfred Hill
 * String Quartet No. 15 (Milhaud), Op. 291, No. 2, by Darius Milhaud
 * String Quartet No. 15 (Mozart) by Wolfgang Amadeus Mozart
 * String Quartet No. 15 (Schubert) by Franz Schubert
 * String Quartet No. 15 (Shostakovich) by Dmitri Shostakovich
 * String Quartet No. 15 (Simpson) by Robert Simpson
 * String Quartet No. 15 (Spohr) by Louis Spohr
 * String Quartet No. 15 (Villa-Lobos) by Heitor Villa-Lobos