Illinois's 4th congressional district (IL-04)
Illinois's 4th congressional district (IL-04) covers parts or all of Cook County and DuPage County, and 35 ZIP codes (8 wholly inside it). Its 2020 population was 753,677. This is the map in force for the November 3, 2026 election.
Who represents IL-04
| Office | Member | Contact |
|---|---|---|
| U.S. Representative (IL-04) | Jesús G. "Chuy" García (D) | 202-225-8203 |
| U.S. Senator | Richard J. Durbin (D) | 202-224-2152 · contact form |
| U.S. Senator | Tammy Duckworth (D) | 202-224-2854 · contact form |
Officials serving now (members of Congress until January 3, 2027). Sources: Members of Congress: the @unitedstates project, congress-legislators (CC0).
Counties
| County | Share of the county's residents in IL-04 |
|---|---|
| Cook County | 14% |
| DuPage County | 4.1% |
ZIP codes
Percentages mark ZIPs only partly in IL-04: the share of that ZIP's residents inside it.
- 60126 (32%)
- 60131 (72%)
- 60153 (8.5%)
- 60160 (100%)
- 60162 (0.4%)
- 60163 (58%)
- 60164
- 60165
- 60171 (37%)
- 60181 (0.2%)
- 60304 (<0.1%)
- 60402
- 60453 (6.7%)
- 60455 (1.8%)
- 60459
- 60501 (95%)
- 60513
- 60514 (29%)
- 60521 (99%)
- 60523 (40%)
- 60525 (39%)
- 60526 (85%)
- 60527 (1.1%)
- 60534
- 60546 (89%)
- 60558 (<0.1%)
- 60608 (86%)
- 60609 (52%)
- 60616 (0.9%)
- 60623 (67%)
- 60629 (72%)
- 60632
- 60638 (44%)
- 60652 (37%)
- 60804
Towns
Berwyn township, Cicero township, Riverside township, Stickney township, Leyden township, Lyons township, Proviso township, York township, Chicago city, Downers Grove township and Worth township.
Get this in your AI agent
Your agent can draw every precinct in IL-04, or list them with population shares (related_geographies). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
get_boundaries(id="us:congressional_district:1704", children_level="precinct", include_districts=True)