Illinois's 11th congressional district (IL-11)
Illinois's 11th congressional district (IL-11) covers parts or all of 8 counties, including McHenry County, Boone County, Kane County, DuPage County, Will County and DeKalb County, and 62 ZIP codes (10 wholly inside it). Its 2020 population was 753,677. This is the map in force for the November 3, 2026 election.
Who represents IL-11
| Office | Member | Contact |
|---|---|---|
| U.S. Representative (IL-11) | Bill Foster (D) | 202-225-3515 |
| 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-11 |
|---|---|
| McHenry County | 53% |
| Boone County | 49% |
| Kane County | 42% |
| DuPage County | 24% |
| Will County | 12% |
| DeKalb County | 9.4% |
| Lake County | 3.1% |
| Cook County | 0.2% |
ZIP codes
Percentages mark ZIPs only partly in IL-11: the share of that ZIP's residents inside it.
- 60010 (1.9%)
- 60012
- 60013 (8.2%)
- 60014 (46%)
- 60030 (0.2%)
- 60033 (0.1%)
- 60041 (0.5%)
- 60042 (68%)
- 60050 (85%)
- 60051 (44%)
- 60060 (0.3%)
- 60073 (6.3%)
- 60084 (78%)
- 60097 (0.9%)
- 60098 (96%)
- 60102 (12%)
- 60109
- 60119 (100%)
- 60124 (35%)
- 60134 (81%)
- 60135 (96%)
- 60140 (45%)
- 60142 (96%)
- 60144
- 60145 (87%)
- 60146 (0.2%)
- 60151 (72%)
- 60152 (98%)
- 60156 (55%)
- 60174 (43%)
- 60175 (61%)
- 60178 (2.6%)
- 60180
- 60183
- 60439 (49%)
- 60440
- 60446 (10%)
- 60464 (2.2%)
- 60490 (64%)
- 60502
- 60504 (78%)
- 60505 (51%)
- 60506 (86%)
- 60510 (99%)
- 60516 (5.8%)
- 60517
- 60519
- 60527 (17%)
- 60532 (37%)
- 60539
- 60540 (100%)
- 60542 (99%)
- 60544 (11%)
- 60554 (2.7%)
- 60555 (38%)
- 60561 (13%)
- 60563 (100%)
- 60564 (12%)
- 60565 (83%)
- 61008 (75%)
- 61038 (93%)
- 61065 (0.9%)
Towns
Batavia township, Blackberry township, Bonus township, Burlington township, Campton township, Coral township, Dorr township, Genoa township, Grafton township, Hampshire township, Kaneville township, Kingston township, Marengo township, Naperville township, Nunda township, Plato township, Riley township, Seneca township, Spring township, Virgil township, Du Page township, Lisle township, Flora township, Geneva township, Wauconda township, Aurora township, Belvidere township, Greenwood township, McHenry township, Lemont township, St. Charles township, Hartland township, Rutland township, Winfield township, Downers Grove township, Grant township, Fremont township, Lockport township and Sycamore township.
Get this in your AI agent
Your agent can draw every precinct in IL-11, 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:1711", children_level="precinct", include_districts=True)