Additional bus companies, listed as existing during additional years or decades, are mentioned in old City Directories, and in the WPA American Guide Series of state guidebooks.
Suburban and interurban bus companies listed in the Russell's Official National Motor Coach Guide, which was primarily a resource for intercity bus lines.
ES&N Bus Line (to Washington IN, until 1955)
Cumberland Coaches - existed in 1940's to 1960's.
Air Line Service - connected Evansville with Poseyville, Cynthiana, Owensville.
McCleary Coach Lines - served Evansville and suburbs, existed in 1930's to 1960's.