Joliet, Illinois
Joliet is a city in Will County (91% of residents) and Kendall County (9.3%), Illinois, with 150,642 residents in 2020. It spans 2 congressional districts: IL-14 (97%) and IL-01 (2.6%). It spans 4 state senate and 6 state house districts.
County
| County | Share of residents |
|---|---|
| Will County | 91% |
| Kendall County | 9.3% |
Congressional districts
| Congressional district | Share of residents |
|---|---|
| Illinois's 14th congressional district (IL-14) | 97% |
| Illinois's 1st congressional district (IL-01) | 2.6% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (IL-14) | Lauren Underwood (D) | 202-225-2976 | 97% |
| U.S. Representative (IL-01) | Jonathan L. Jackson (D) | 202-225-4372 | 2.6% |
| U.S. Senator | Richard J. Durbin (D) | 202-224-2152 · contact form | statewide |
| U.S. Senator | Tammy Duckworth (D) | 202-224-2854 · contact form | statewide |
| State Senator (State Senate District 49) | Meg Loughran Cappel (Democratic) | 815-267-6119 | 55% |
| State Senator (State Senate District 43) | Rachel Ventura (Democratic) | 331-290-0443 | 43% |
| State Senator (State Senate District 19) | Mike Hastings (Democratic) | 2.6% | |
| State Senator (State Senate District 38) | Sue Rezin (R) | 815-220-8720 | <0.1% |
| State Representative (State House District 86) | Larry Walsh (Democratic) | 815-730-8600 | 43% |
| State Representative (State House District 97) | Jessica Dixon Heitman (Democratic) | 815-254-0000 | 32% |
| State Representative (State House District 98) | Natalie Manley (Democratic) | 815-725-2741 | 23% |
| State Representative (State House District 37) | Patrick Sheehan (R) | 708-694-2032 | 2.6% |
| State Representative (State House District 85) | Dee Avelar (Democratic) | 815-372-0085 | 0.2% |
| State Representative (State House District 75) | Jed Davis (R) | 331-867-8200 | <0.1% |
Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).
Local government
- Joliet website: https://www.joliet.gov/
- Joliet laws: search for the Joliet, Illinois code of ordinances
- Will County website: https://www.willcountyillinois.com/
- Will County laws: search for the Will County, Illinois code of ordinances
- Kendall County website: https://kendallcountyil.gov
- Kendall County laws: search for the Kendall County, Illinois code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 49 | 55% |
| State Senate District 43 | 43% |
| State Senate District 19 | 2.6% |
| State Senate District 38 | <0.1% |
| State house district | Share of residents |
|---|---|
| State House District 86 | 43% |
| State House District 97 | 32% |
| State House District 98 | 23% |
| State House District 37 | 2.6% |
| State House District 85 | 0.2% |
| State House District 75 | <0.1% |
ZIP codes
Percentages mark ZIPs only partly in Joliet: the share of that ZIP's residents living in it.
- 60421 (3.3%)
- 60431 (91%)
- 60432 (79%)
- 60433 (47%)
- 60435 (94%)
- 60436 (84%)
- 60441 (1.6%)
- 60447 (1.2%)
- 60451 (4.9%)
- 60544 (0.2%)
- 60560 (<0.1%)
- 60586 (81%)
Get this in your AI agent
Your agent can get Joliet's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:place:1738570")
Joliet here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.