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.
Bremerton-Tacoma Stages (Bremerton to Tacoma, until 1987)
Ace Stage Co. - existed in 1930's.
Bay Shore Stage Line - existed in 1950's to 1960's.
Benjamin Franklin Lines - existed in 1930's.
Blue Gray Lines - existed in 1940's to 1950's.
Blue Line - existed in 1930's.
Bremerton Stages - existed in 1930's.
Fort Lewis Exchange Bus - existed in 1930's to 1950's.
Grays Harbor Stages - existed in 1930's.
Independent Dollar Line - existed in 1930's.
Independent Stages - existed in 1930's to 1940's.
Lake Drive Transit Co. - connected Tacoma with Lakewood, existed in 1940's to 1960's.
Lake Shore Lines - existed in 1930's.
Marine Highway Transportation Co. - existed in 1940's to 1950's.
National Park Stages - existed in 1930's.
Nisqually Valley Lines - served Vail, Rainer, Yelm, Nickenna, Roy, Tacoma, existed in 1950's to 1960's.
Puyallup-Tacoma Transit Co. - existed 1921 to 1930's.
Tacoma Suburban Lines - existed in 1950's to 1960's.
Waller Road & Summit Bus Co. - served Tacoma, suburbs, existed in 1930's to 1960's.
Woodland Bus Co. - existed in 1930's to 1960's.