ZIP code 48603: Saginaw, MI
ZIP code 48603 is in Saginaw County, Michigan, outside any city or Census-designated place. It is in Michigan's 8th congressional district. Its state senate district is State Senate District 35; its state house districts are State House District 94 (76%), State House District 93 (23%) and State House District 97 (0.4%).
See it on the mapAll of Michigan
City and county
| City or town | Share of ZIP residents |
|---|---|
| Saginaw | 0.1% |
| Freeland | 0.1% |
| County | Share of ZIP residents |
|---|---|
| Saginaw County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Saginaw charter township | 99% |
| Tittabawassee township | 0.4% |
| Saginaw city | 0.1% |
| Kochville township | <0.1% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Michigan's 8th congressional district (MI-08) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MI-08) | Kristen McDonald Rivet (D) | 202-225-3611 | 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 35) | Chedrick Greene (Democratic) | 100% | |
| State Representative (State House District 94) | Amos O'Neal (Democratic) | 76% | |
| State Representative (State House District 93) | Tim Kelly (R) | 23% | |
| State Representative (State House District 97) | Matt Bierlein (R) | 0.4% |
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
- Saginaw County website: http://www.saginawcounty.com/
- Saginaw County laws: search for the Saginaw County, Michigan code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 35 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 94 | 76% |
| State House District 93 | 23% |
| State House District 97 | 0.4% |
Voting precincts
12 voting precincts overlap ZIP 48603. 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:48603")
ZIP 48603 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.