Bridgeport Auto Transit Co. - city service in Bridgeport and Stratford.
Chestnut Hill Bus Corp. - served Bridgeport and suburbs.
Gray Line Bus Corp. - city service in Bridgeport.
Huntington Road-Stratford Bus Lines - city service in Bridgeport and Stratford.
Trumbull Coach Lines - served Bridgeport and Trumbull.
White Line Bus Corp. - connected Bridgeport with Trumbull.
Danbury-Brewster Bus Corp. - connected Danbury with Brewster NY.
Silver Lane Bus Line - connected Hartford with East Hartford, Manchester.
Corbin Avenue Bus Service - city service in New Britain.
East Street Bus Line - city service in New Britain.
Mastco Bus Line - city service in New Britain.
Orange Street Bus Line - city service in New Haven.
Rose's Bus Service - city service in Wallingford.
New London-Niantic Coach Co. - suburban served New London to Old Lyme.
Intercity Coach Co. - served Torrington, Litchfield, Bantam, New Preston, New Milford, Danbury, Norfolk, Brewster NY.
Intercity Valley Line - served Bridgeport to Waterbury.
More is known about these bus companies which generally operated over somewhat longer distances, and were normally listed in the Russell's Guide.
Bus companies operating over longer distances than the above suburban and interurban companies, but not listed in the Russell's Guide.
Lakeland Transportation Co. - intercity served Canaan to Poughkeepsie NY.