1904-1906 - Grays Harbor Electric Co.
1906-1947 - Grays Harbor Railway & Light Co.
1932 - streetcars replaced with buses
Prior to 1974 - Tri-City Transit Co.
CURRENT TRANSIT SYSTEM (SINCE 1975)
Grays Harbor Transportation Authority
1891-1895 - Port Townsend Street Railway Light & Power Co.
1895 - streetcars discontinued
1915-1919 - City Transfer Co.
1919-1969 - Lafferty Stage Lines
1969-1972 - McDowell Lafferty Lines
1972-1980 - Stevens Stage Lines
CURRENT TRANSIT SYSTEM (SINCE 1981)
Jefferson Transit
1948-1950's - Port Angeles Transit
Period of no transit service
CURRENT TRANSIT SYSTEM (SINCE 1979)
Clallam Transit
1910-1929 - Twin City Light & Traction Co.
1929 - streetcars replaced with buses
1929-1940's - Twin Cities Bus Co.
1950's-1960's - Twin City Transit Co.
CURRENT TRANSIT SYSTEM (SINCE 1976)
Twin Transit
1920's-1950's - Longview Public Service Co.
1975-1987 - Community Urban Bus Service (CUBS)
1988-2011 - Cowlitz Transit Authority
CURRENT TRANSIT SYSTEM (SINCE 2011)
River Cities Transit
NEWER TRANSIT SYSTEM
CAP Public Transit
CURRENT TRANSIT SYSTEM (SINCE 1980)
Pacific Transit System
HISTORIC INTERURBAN TYPE RAILWAY
South Bend-Raymond
1912-1913 - Willapa Harbor Railway Co.
After 1913 - Willapa Electric Co.
1930 - interurban trains replaced with buses
Horse Car
1891-1896 - Columbia Land & Improvement Co.
Electric Streetcar
1908-1911 - Vancouver Traction Co.
1911-1915 - Washington-Oregon Corp.
1915-1923 - North Coast Power Co.
1923-1927 - Puget Sound Power & Light Co.
1927 - streetcars discontinued
1928-1969 - Vancouver Bus Co.
1969-1981 - City of Vancouver Transit
CURRENT TRANSIT SYSTEM (SINCE 1981)
C-Tran
Newer Transit Systems
CURRENT TRANSIT SYSTEM
Skamania County Transit Services
Historic suburban/interurban bus lines operated by several companies (mostly a 1952 sampling)