California Bus Service - served Richeyville, Brownsville, Newell, Fayette City, Belle Vernon.
Patsch Auto Bus Co. - suburban based in Houston PA, no further information.
Union Transit Co. - served Waynesburg to Pt. Marion and Masontown.
Westside Motor Transit Co. - suburban served Charleroi, Monesson, Belle Vernon, Fairhope, Fayette City.