ZIP code 49203: Jackson, MI
ZIP code 49203 is in Jackson (41% of residents), Vandercook Lake (12%) and Michigan Center (2.7%), in Jackson County, Michigan. 45% of its residents live outside city limits. It is in Michigan's 5th congressional district. Its state senate district is State Senate District 14; its state house districts are State House District 46 (73%) and State House District 47 (27%).
See it on the mapAll of Michigan
City and county
| City or town | Share of ZIP residents |
|---|---|
| Jackson | 41% |
| Vandercook Lake | 12% |
| Michigan Center | 2.7% |
| County | Share of ZIP residents |
|---|---|
| Jackson County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Summit township | 49% |
| Jackson city | 41% |
| Leoni township | 5.2% |
| Blackman charter township | 4.6% |
| Napoleon township | 0.4% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Michigan's 5th congressional district (MI-05) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MI-05) | Tim Walberg (R) | 202-225-6276 | 100% |
| U.S. Senator | Elissa Slotkin (D) | 202-224-4822 | statewide |
| U.S. Senator | Gary C. Peters (D) | 202-224-6221 · contact form | statewide |
| State Senator (State Senate District 14) | Sue Shink (Democratic) | 100% | |
| State Representative (State House District 46) | Kathy Schmaltz (R) | 73% | |
| State Representative (State House District 47) | Carrie Rheingans (Democratic) | 27% |
Elected under MI's previous legislative map; the district's lines changed for 2026.
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
- Jackson website: http://www.cityofjackson.org/
- Jackson laws: search for the Jackson, Michigan code of ordinances
- Vandercook Lake laws: search for the Vandercook Lake, Michigan code of ordinances
- Michigan Center laws: search for the Michigan Center, Michigan code of ordinances
- Jackson County website: http://www.co.jackson.mi.us
- Jackson County laws: search for the Jackson County, Michigan code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 14 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 46 | 73% |
| State House District 47 | 27% |
Voting precincts
19 voting precincts overlap ZIP 49203. Map them, with each precinct's share of the ZIP's residents.
Get this in your AI agent
Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:zcta:49203")
ZIP 49203 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.