Illinois's 5th congressional district

Illinois's 5th congressional district
Interactive map of district boundaries since January 3, 2023
Representative	Mike Quigley D–Chicago
Area	158.3 sq mi (410 km2)
Distribution	100.0% urban 0.0% rural
Population (2022)	732,819
Median household income	$104,191[1]
Ethnicity	71.3% White 11.7% Hispanic 10.7% Asian 3.3% Two or more races 2.4% Black 0.5% other
Cook PVI	D+18[2]

The 5th congressional district of Illinois covers parts of Cook and Lake counties, as of the 2023 redistricting which followed the 2010 census. All or parts of Chicago, Inverness, Arlington Heights, Barrington Hills, Des Plaines, Palatine, Mount Prospect, Deer Park, Kildeer, Lake Zurich, Long Grove, and North Barrington are included.

It has been represented by Democrat Mike Quigley since the April 2009 special election.

The district was created as part of the 28th United States Congress, which first met on March 4, 1843; it was initially represented by Stephen A. Douglas, whose Kansas–Nebraska Act prompted the creation of the Republican Party. Since the 1990s redistricting, it has covered most of Chicago's North Side; the 2010 redistricting extended it into DuPage County. It was represented by Democrat Rahm Emanuel from January 2003 until he resigned on January 2, 2009, to become White House Chief of Staff. On April 8, 2009, Mike Quigley won a special election to fill the seat.^[3]

The district has a Cook Partisan Voting Index score of D +20.^[4] The district and its predecessors have been in Democratic hands for all but four years since 1909. Two of those years came after Dan Rostenkowski lost his seat to Republican Michael Patrick Flanagan because of the Congressional Post Office scandal. On a national level, the scandal helped prompt the Republican Revolution of 1994. However, Flanagan was defeated after only one term by State Representative Rod Blagojevich in 1996, and no Republican has managed even 35 percent of the vote in the district since then. Blagojevich handed the seat to Emanuel in 2003.