The 1911 United States House of Representatives elections in Arizona was held on Tuesday December 12, 1911 to elect the states at-large representative. Representative of Arizona's non-voting delegate Ralph H. Cameron decided not to run.
Democrat nominee Carl Hayden won the democratic primary on October 4, 1911 by 1,552 votes. He won the general election over Republican John S. Williams and socialist candidate John Halberg with 54.05% of the vote.
