Additional bus companies, listed as existing during 1930's, are mentioned in the WPA American Guide Series of state guidebooks.
Hollidaysburg Transportation Co. - served Hollidaysburg, East Freedom, Claysburg, Sproul.
Gearhart's Bus Line - city and intercity service in Waynesboro.
Cooper's Bus Line - served Port Royal, East Waterford, Dry Run, Chambersburg.
Lake Lines - suburban served North East, Harbor Creek, Wesleyville.
LeBoeuf Bus Lines - served Meadville, Cambridge Springs, Mill Village, Union City, Wattsburg, Lowville, Erie.
Francis E. Daly Bus Co. - served Johnstown, Sidman, Salix, Elton, Dunlo.
Johnson's Taxi-Bus Service - served Portage and Beaverdale.
Bessemer-Hillsville Bus Co. - suburban served Hillsville, New Castle, Lowellville, Struthers, Campbell, Youngstown OH.
McComb Bus Service - connected New Castle with Farrel, Sharon.
City Rapid Transit Lines - city service in Greenville.
Brandywine Transit Co. - served Ephrata, Reading, Christiana, Coatesville, West Chester and intermediate points.
Bohartz Bus Lines - suburban served Gardenview, Hepburnville, Cogan Station, Trout Run, Bodines, Ralston, Roaring Branch, Grover, Canton PA.
Johnston's Lines - existed in 1930's.
Valley Cab Service - served Eagles Mere, Muncy, Hughesville, Picture Rocks, Montgomery.
Rural Valley Kittanning & Sagamore Bus Line - served Rural Valley, Kittanning, Sagamore, Yatesboro, Numine.
A. L. Reynolds - served Blairsville, Black Lick, Josephine, Palmertown.
F. E. Roy - served Indiana, Ernest, Creekside, Plumville, Sacamore.
Boalsburg Auto Bus Line - served State College, Boalsburg, Potters Mills, Lewistown.
Irvin Bus Lines - suburban served Mt. Union, Saltillo, Orbisonia, Blairs Mills, Shade Gap, Waterfall, McConnellsburg, Fort Loudon.
Johnson's Motor Coach Line - existed in 1930's.
K. V. Bus Line - suburban served Belleville to Lewistown, Belleville to Allensville.
Potter's Bus Line - served Mexico, Port Royal, Mifflintown, Lewistown, Burnham.
White Star Bus Line - served Lewistown and Burnham.
Oscar Booher - suburban served Pennsylvania Turnpike.
Wayne Auto Transportation Co. - served Hawley, White Mills, Honesdale, Tobyhanna.
Bus companies operating over longer distances than the above suburban and interurban companies, but not listed in the Russell's Guide.
Smeal Bus Co. - intercity served New Castle, West Pittsburgh, Bessemer, Wampum, Enon Valley, Ellwood City.