The 1911 Los Angeles mayoral election took place on October 31, 1911, with a run-off election on December 5, 1911. Incumbent George Alexander was re-elected for a second full term against Job Harriman.

Job Harriman was an ordained minister who later became an agnostic and a socialist. In 1900, he ran for vice president of the United States along with Eugene Debs on the ticket of the Socialist Party of America. He later twice ran for mayor of Los Angeles, drawing considerable attention and support. He also founded a socialist utopian community called Llano del Rio in California, later relocated to Louisiana.