1906-1907 - Northern Electric Co.
1907-1918 - Northern Electric Railway Co.
1918-1940 - Sacramento Northern Railroad
Interurban lines:
Chico-Oroville (1906-1938)
Chico-Marysville (1906-1940)
Marysville-Sacramento (1907-1940)
Chico-Hamilton (1907-1940)
Sacramento-Woodland (1912-1940)
Yuba City-Colusa (1913-1940)
Suisun-Vacaville (1913-1926)
1910-1911 - Oakland & Antioch Railway
1911-1920 - Oakland Antioch & Eastern Railway
1920-1928 - San Francisco-Sacramento Railroad Co.
1928-1941 - Sacramento Northern Railroad
Interurban lines:
Sacramento-Oakland (1910-1940)
Pittsburg-Oakland (1913-1941)
Saranap-Danville (1914-1924)
Replacement bus companies:
Sacramento Northern Railway (1924-1941)
Pacific Greyhound Lines (after 1941)
1915-1917 - Sacramento Valley Electric Railroad Co.
Interurban lines:
Dixon Junction-Dixon (1915-1917)