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.
Intercity Coach Co. (to Waterbury and Danbury, until 1958)
Bridgeport Auto Transit Co. - city service in Bridgeport and Stratford, existed in 1920's to 1960's.
William Bush - existed in 1920's to 1960's.
Central Bus Corporation - existed in 1920's to 1940's.
Chestnut Hill Bus Corp. - served Bridgeport and suburbs, existed in 1930's to 1960's.
Colonial Motor Coach - existed in 1930's to 1940's.
Danbury Interurban Bus Co. - existed in 1920's to 1950's.
Denomme Bus Service - existed in 1930's to 1950's.
Gray Line Bus Corp. - city service in Bridgeport, existed in 1920's to 1960's.
Huntington Road Bus Line - existed in 1930's to 1950's.
Huntington Road-Stratford Bus Lines - city service in Bridgeport and Stratford.
Intercity Valley Line - served Bridgeport to Waterbury, existed in 1940's to 1950's.
Larry's Bus Service - existed in 1950's to 1960's.
Sportline Bus Co. - existed in 1950's to 1960's.
Trumbull Coach Lines - served Bridgeport and Trumbull, existed in 1950's to 1960's.
White Line Bus Corp. - connected Bridgeport with Trumbull, existed in 1920's to 1950's.