The California Street Cable Railroad (Cal Cable) was a long-serving cable car operator in San Francisco, founded by Leland Stanford. The company's first line opened on California Street in 1878 and is still in operation, being the oldest cable car line still in operation.
The company remained independent until 1951, outlasting all the other commercial streetcar and cable car operators in the city. The city purchased and reopened the lines in 1952; the current cable car system is a hybrid made up of the California Street line, and the Hyde Street section of Cal Cable's O'Farrell, Jones & Hyde line, together with other lines already in municipal ownership.