Madison, Illinois
Madison is a city in Madison County (100% of residents) and St. Clair County (<0.1%), Illinois, with 3,171 residents in 2020. It is in Illinois's 13th congressional district. It spans 2 state senate and 3 state house districts.
County
| County | Share of residents |
|---|---|
| Madison County | 100% |
| St. Clair County | <0.1% |
Congressional district
| Congressional district | Share of residents |
|---|---|
| Illinois's 13th congressional district (IL-13) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (IL-13) | Nikki Budzinski (D) | 202-225-2371 | 100% |
| 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 57) | Christopher Belt (Democratic) | 618-875-1212 | 80% |
| State Senator (State Senate District 56) | Erica Harriss (R) | 618-307-5789 | 20% |
| State Representative (State House District 113) | Jay Hoffman (Democratic) | 618-416-7407 | 80% |
| State Representative (State House District 112) | Katie Stuart (Democratic) | 618-365-6650 | 19% |
| State Representative (State House District 111) | Amy Elik (R) | 618-433-8046 | 0.8% |
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
- Madison website: http://www.cityofmadisonil.com/
- Madison laws: search for the Madison, Illinois code of ordinances
- Madison County website: http://www.co.madison.il.us
- Madison County laws: search for the Madison County, Illinois code of ordinances
- St. Clair County laws: search for the St. Clair County, Illinois code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 57 | 80% |
| State Senate District 56 | 20% |
| State house district | Share of residents |
|---|---|
| State House District 113 | 80% |
| State House District 112 | 19% |
| State House District 111 | 0.8% |
ZIP codes
Percentages mark ZIPs only partly in Madison: the share of that ZIP's residents living in it.
Get this in your AI agent
Your agent can get Madison'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:1745993")
Madison 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.