The 2006 congressional elections in Arizona were elections for Arizona's delegation to the United States House of Representatives, which occurred along with congressional elections nationwide on November 7, 2006. Arizona has eight seats, as apportioned during the 2000 United States Census. Prior to the election, Republicans held six of the eight seats and Democrats held two. In the 8th district, Republican Congressman Jim Kolbe retired, leaving an open seat. Following the elections, Democrats gained two seats at the expense of the Republicans, who lost two.