Illinois's 3rd congressional district

Illinois's 3rd congressional district
Interactive map of district boundaries since January 3, 2023
Representative	Delia Ramirez D–Chicago
Area	156.9 sq mi (406 km2)
Population (2022)	708,538
Median household income	$78,452[1]
Ethnicity	47.3% Hispanic 39.1% White 6.1% Asian 4.6% Black 2.3% Two or more races 0.5% other
Cook PVI	D+20[2]

Illinois's 3rd congressional district includes parts of Cook County and DuPage County, and has been represented by Democrat Delia Ramirez since January 3, 2023. The district was previously represented by Marie Newman from 2021 to 2023, Dan Lipinski from 2005 to 2021, and by Lipinski's father Bill from 1983 to 2005.

The district includes the western and southwestern suburbs of Chicago as far as the DuPage County border, as well as portions of the Southwest Side of the city of Chicago itself, and covers 124.5 square miles (322 km²), making it one of the 50 smallest districts in the U.S., although there are five smaller districts in Illinois. It is adjacent to the 1st district to the east and south, the 4th district to the north, and the 11th district to the west, and also borders the 6th and 7th districts at its northwestern and northeastern corners, respectively. The district was created following the 1830 census and came into being in 1833, five months before Chicago was organized as a town; it initially included northern and western Illinois^[3] before representing areas of east-central and northwestern Illinois from 1843 to 1873.^[4][5][6] The district has included part of Chicago since 1873, and part of the city's southwest side since 1895; the district has been primarily suburban since 1973.