1903-1906 - Coeur D'Alene & Spokane Railway Co.
1906-1919 - Spokane & Inland Empire Railroad Co.
1919-1927 - Spokane & Eastern Railway & Power Co.
1927-1928 - Spokane Coeur D'Alene & Palouse Railway
Interurban lines:
Spokane-Coeur D'Alene ID (1903-1928)
Coeur D'Alene ID-Hayden Lake ID (1906-1928)
Spokane-Liberty Lake (1907-1928)
Spokane-Opportunity (1909-1928)
1907-1919 - Spokane & Inland Empire Railroad Co.
1919-1927 - Inland Empire Railroad Co.
1927-1928 - Spokane Coeur D'Alene & Palouse Railway
Interurban lines:
Spokane-Colfax (1907-1928)
Spring Valley-Moscow ID (1908-1928)
Replacement bus companies:
Auto Interurban Co. (until 1956)
Spokane Suburban Lines (1956-1965)
Empire Lines (after 1965)
1905-1921 - Washington Water Power Co.
Interurban lines:
Spokane-Medical Lake (1905-1921)
Cheney Jct.-Cheney (1907-1921)
Replacement bus companies: (Spokane-Medical Lake)
Carl Walters (until 1935)
Medical Lake Stage Line (1935-1965)
Empire Lines (after 1965)
Replacement bus companies: (Spokane-Cheney)
Sam and Carol Webb (until 1927)
Auto Interurban Co. (1927-1956)
Greyhound Lines (after 1956)