The Mountain State League was a minor league baseball league that played as a six–team league from 1937 to 1942. The league franchises were based in Kentucky and West Virginia. The Mountain State League was a Class D level league from 1937 to 1941 and Class C league in 1942. Baseball Hall of Fame member Stan Musial played in the league for two seasons, as a member of the 1938 and 1939 Williamson Colts.