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.
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.