The cities of Harlan, Kentucky, and Morristown, Tennessee, were represented for the full seven–year existence of the circuit.
A total of 16 teams competed in the Mountain States League.
Both the Morristown Twins and Lexington Colts disbanded on July 7.
[1] Virgil Q. Wacks served as president for the duration of the league.
[1] 1948 Mountain States League - schedule Oak Ridge moved to Hazard June 10 Playoffs: Morristown 3 games, Newport 2; Hazard 3 games, Pennington Gap 0.