The 1914 United States Senate election in Arizona was held on Tuesday November 3, Incumbent United States Senator Marcus Aurelius Smith was reelected to a second term defeating state senator Don Lorenzo Hubbell, the Republican nominee, in the general election by a wide margin. Several third-party candidates also ran in the election including former Prohibition Party presidential candidate Eugene W. Chafin, Socialist nominee Bert Davis Socialist, and Progressive nominee J. Bernard Nelson.