A general election was held in the U.S. state of Arizona on November 6, 2012. Along with the presidential election, a Class I U.S. Senate seat, nine seats in the United States House of Representatives and several statewide and local offices were up for election. Primary elections were held on August 28, 2012.
Republican nominee Mitt Romney won Arizona by defeating Democratic incumbent Barack Obama and gained eleven electoral votes.
Incumbent Republican senator and Senate minority whip Jon Kyl decided not to seek a fourth term, thus creating an open seat. Republican U.S. representative Jeff Flake won the election by narrowly defeating Democratic nominee and former surgeon general of the United States Richard Carmona.
A special election was held in the 8th congressional district to replace Gabby Giffords. Democrat Ron Barber won the election by defeating Republican Jesse Kelly.
Following the 2010 United States census, Arizona gained one electoral vote, thus bringing the total number of congressional districts in the state to nine.
Three of the five seats on the Arizona Corporation Commission were up for election. Democratic incumbents Paul Newman and Sandra Kennedy and Republican incumbent Bob Stump all ran for re-election. Both Newman and Kennedy were ousted as Republicans swept all three seats.
All 30 members of the Arizona Senate and all 60 members of the Arizona House of Representatives were up for election. Democrats flipped multiple seats in both chambers.
One seat on the Arizona Supreme Court was up for retention. Justice John Pelander was appointed by Governor Jan Brewer in 2009 to succeed retiring justice Ruth McGregor.
Arizona had nine statewide propositions on the ballot in 2012.