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Illinois's 1st Congressional District (IL-1)

Last updated · 7 sources

Jonathan Jackson, a Democrat, has represented the district since 2023.

The district includes parts of Will, Kankakee, and Cook counties.

According to the Census Bureau's 2020–2024 American Community Survey 5-year estimates, the district has a population of 739,958, a median household income of $71,465, and a median age of 39.9. Of residents 25 and older, 32.3% hold a bachelor's degree or higher.

Representative

Official portrait of Jonathan Jackson, U.S. Representative for Illinois's 1st District
Jonathan Jackson

U.S. Representative for Illinois's 1st District · Democrat

ProfileSchedule this week

2026 election

Jackson has filed with the FEC to run for this seat in 2026.

3 candidates have reported raising money for the 2026 IL-1 race to the FEC.

Election Day: Tuesday, November 3, 2026

Candidates for IL-1 in 2026 who reported raising money to the FEC
CandidatePartyRaisedCash on handThrough
Jonathan Jackson (incumbent)Democratic$418,350$47,163Jun 30
Christian MaxwellRepublican$63,316$33,832Jun 30
Joely Faren KingDemocratic$1,439$898Sep 30, 2025

Includes primary candidates; FEC filings do not record primary results. FEC race page

District profile

Population
739,958
Median household income
$71,465
Median age
39.9
Bachelor's degree or higher
32.3%

Census Bureau, 2020–2024 American Community Survey 5-year estimates

Places and ZIP codes

IL-1 covers all of 21 places, the largest New Lenox, Homer Glen, and Mokena, and part of 29 more places, the largest Chicago, Joliet, and Orland Park.

Alsip (part), Andres, Arbury Hills, Blue Island (part), Bonnie Brae, Bourbonnais (part), Braceville (part), Bradley (part), Braidwood (part), Calumet Park, Channahon (part), Chicago (part), Country Club Hills (part), Crestwood (part), Custer Park, Diamond (part), Dixmoor (part), Elwood (part), Evergreen Park (part), Frankfort (part), Frankfort Square, Godley (part), Harvey (part), Homer Glen, Joliet (part), Lakewood Shores, Lemont (part), Lockport (part), Lockport Heights, Lorenzo, Manhattan, Manteno, Markham (part), Marley, Midlothian (part), Minooka (part), Mokena, New Lenox, Oak Forest (part), Orland Park (part), Palos Park (part), Posen, Rest Haven, Ritchie, Riverdale (part), Robbins (part), Symerton, Tinley Park (part), Wilmington, Wilton Center

IL-1 covers all of 7 ZIP codes and part of 48 more.

60404 (part), 60406 (part), 60407 (part), 60408, 60410 (part), 60416 (part), 60418 (part), 60421 (part), 60423 (part), 60426 (part), 60428 (part), 60432 (part), 60433 (part), 60436 (part), 60439 (part), 60441 (part), 60442 (part), 60443 (part), 60445 (part), 60447 (part), 60448, 60449 (part), 60451, 60452 (part), 60467 (part), 60468 (part), 60469, 60472 (part), 60477 (part), 60478 (part), 60481 (part), 60487 (part), 60491, 60609 (part), 60615 (part), 60616 (part), 60617 (part), 60619, 60620, 60621 (part), 60628 (part), 60629 (part), 60637 (part), 60643 (part), 60649 (part), 60652 (part), 60653 (part), 60655 (part), 60803 (part), 60805 (part), 60827 (part), 60901 (part), 60914 (part), 60915 (part), 60950 (part)

Illinois senators

Neighboring districts

  • IL-2 · Robin Kelly (D)
  • IL-4 · Chuy García (D)
  • IL-6 · Sean Casten (D)
  • IL-7 · Danny Davis (D)
  • IL-11 · Bill Foster (D)
  • IL-14 · Lauren Underwood (D)
  • IL-16 · Darin LaHood (R)

Sources