String Quartet No. 8
String Quartet No. 8 may refer to:

 String Quartet No. 8 (Beethoven) by Ludwig van Beethoven
 String Quartet No. 8 (Diamond) by David Diamond
 String Quartet No. 8 (Dvořák) by Antonín Dvořák
 String Quartet No. 8 (Hill) by Alfred Hill
 String Quartet No. 8 (Maconchy) by Elizabeth Maconchy
 String Quartet No. 8 (Milhaud), Op. 121, by Darius Milhaud
 Quartet No. 8 in F major, K. 168, part of the Viennese Quartets by Wolfgang Amadeus Mozart
 String Quartet No. 8 (Porter) by Quincy Porter
 String Quartet No. 8 (Rihm) by Wolfgang Rihm
 String Quartet No. 8 (Schubert) by Franz Schubert
 String Quartet No. 8 (Shostakovich) by Dmitri Shostakovich
 String Quartet No. 8 (Simpson) by Robert Simpson
 String Quartet No. 8 (Spohr) by Louis Spohr
 String Quartet No. 8 (Villa-Lobos) by Heitor Villa-Lobos