ZIP code 48079: St. Clair, MI
ZIP code 48079 is in St. Clair (44% of residents), in St. Clair County, Michigan. 56% of its residents live outside city limits. It is in Michigan's 9th congressional district. Its state senate district is State Senate District 25; its state house districts are State House District 63 (56%) and State House District 64 (44%).
See it on the mapAll of Michigan
City and county
| City or town | Share of ZIP residents |
|---|---|
| St. Clair | 44% |
| County | Share of ZIP residents |
|---|---|
| St. Clair County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| St. Clair township | 56% |
| St. Clair city | 44% |
| Marysville city | land only |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Michigan's 9th congressional district (MI-09) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MI-09) | Lisa C. McClain (R) | 202-225-2106 | 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 25) | Dan Lauwers (R) | 100% | |
| State Representative (State House District 63) | Jay DeBoyer (R) | 56% | |
| State Representative (State House District 64) | Joe Pavlov (R) | 44% |
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
- St. Clair website: http://www.cityofstclair.com/
- St. Clair laws: search for the St. Clair, Michigan code of ordinances
- St. Clair County laws: search for the St. Clair County, Michigan code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 25 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 63 | 56% |
| State House District 64 | 44% |
Voting precincts
6 voting precincts overlap ZIP 48079. 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:48079")
ZIP 48079 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.