2010 United States House of Representatives elections in Arizona

The 2010 congressional elections in Arizona were held on November 2, 2010, to determine who would represent the state of Arizona in the United States House of Representatives. Arizona had eight seats in the House, apportioned according to the 2000 United States census. Representatives were elected for two-year terms; those elected were to serve in the 112th Congress from January 3, 2011, until January 3, 2013.

The state's 2009-2010 delegation consisted of five Democrats and three Republicans. With the exception of Democrat Ann Kirkpatrick, who had won the open seat in District 1 during the previous election, all members of the delegation were incumbents who had served for at least a full term in Congress. Also, with the exception of retiring Republican John Shadegg of District 3, all incumbent members of the state's delegation ran for re-election.

As of August 17, 2010, Districts 1, 5 and 8, all held by Democrats, were considered to be competitive by both CQ Politics and The Cook Political Report. The primary elections for Congressional races were held on August 24, 2010.

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