 In the [[United States House of Representatives|U.S.House of Representatives]], DuPage County is in the [[Illinois's 5th congressional district|5th]], [[Illinois's 6th congressional district|6th]], [[Illinois's 8th congressional district|8th]], [[Illinois's 11th congressional district|11th]] and [[Illinois's 14th congressional district|14th]] districts.In the 2018 general election, despite the county's historical Republican dominance, Democrats won every congressional district within the county.