American Quartet may refer to: American Quartet (novel), a mystery novel by Warren Adler String Quartet No. 12 (Dvořák) by Antonín Dvořák, nicknamed the American Quartet American Quartet (ensemble), a vocal group that recorded from 1899 to 1925 A band led by jazz pianist Keith Jarrett in the 1970s Also: The American Quartette, a 1920s vocal quartet