Elections were held on November 2, 2010, to determine Illinois's 19 members of the United States House of Representatives. Representatives were elected for two-year terms to serve in the 112th United States Congress from January 3, 2011, until January 3, 2013. Primary elections were held on February 2, 2010.
Of the 19 elections, the 10th, 11th, 14th and 17th districts were rated as competitive by CQ Politics and The Rothenberg Political Report; while the 8th, 10th, 11th, 14th and 17th districts were rated as competitive by The Cook Political Report and Sabato's Crystal Ball. Of Illinois's nineteen U.S. Representatives, fourteen were re-elected. Republican Mark Kirk of the 10th district did not seek re-election in order to run for the U.S. Senate, while Democrats Melissa Bean of the 8th district, Debbie Halvorson of the 11th district, Bill Foster of the 14th district and Phil Hare of the 17th district were defeated in the general election. Joe Walsh, Adam Kinzinger, Randy Hultgren, a