Decatur, Illinois
Decatur is a city in Macon County, Illinois, with 70,844 residents in 2020. It spans 2 congressional districts: IL-13 (60%) and IL-15 (40%). It spans 3 state senate and 3 state house districts.
County
| County | Share of residents |
|---|---|
| Macon County | 100% |
Congressional districts
| Congressional district | Share of residents |
|---|---|
| Illinois's 13th congressional district (IL-13) | 60% |
| Illinois's 15th congressional district (IL-15) | 40% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (IL-13) | Nikki Budzinski (D) | 202-225-2371 | 60% |
| U.S. Representative (IL-15) | Mary E. Miller (R) | 202-225-5271 | 40% |
| 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 48) | Doris Turner (Democratic) | 217-670-1828 | 77% |
| State Senator (State Senate District 44) | Sally Turner (R) | 217-651-8291 | 22% |
| State Senator (State Senate District 54) | Steve McClure (R) | 217-960-0788 | 1.5% |
| State Representative (State House District 96) | Sue Scherer (Democratic) | 217-877-9636 | 77% |
| State Representative (State House District 88) | Regan Deering (R) | 217-876-1968 | 22% |
| State Representative (State House District 107) | Brad Halbrook (R) | 217-342-0220 | 1.5% |
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
- Decatur laws: search for the Decatur, Illinois code of ordinances
- Macon County website: https://maconcounty.illinois.gov/
- Macon County laws: search for the Macon County, Illinois code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 48 | 77% |
| State Senate District 44 | 22% |
| State Senate District 54 | 1.5% |
| State house district | Share of residents |
|---|---|
| State House District 96 | 77% |
| State House District 88 | 22% |
| State House District 107 | 1.5% |
ZIP codes
Percentages mark ZIPs only partly in Decatur: the share of that ZIP's residents living in it.
Get this in your AI agent
Your agent can get Decatur'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:1718823")
Decatur 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.