Boundary Atlas

ZIP code 48469: Port Sanilac, MI

ZIP code 48469 is in Port Sanilac (47% of residents), in Sanilac County, Michigan. 53% 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 district is State House District 98.

1,198residents (2020 Census)
7.9 sq miland area
1cities and towns
1congressional district
2voting precincts

See it on the mapAll of Michigan

City and county

City or townShare of ZIP residents
Port Sanilac47%

CountyShare of ZIP residents
Sanilac County100%

Town or county subdivisionShare of ZIP residents
Sanilac township95%
Forester township5.0%

Congressional district

Congressional districtShare of ZIP residents
Michigan's 9th congressional district (MI-09)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 25100%

State house districtShare of ZIP residents
State House District 98100%

Voting precincts

2 voting precincts overlap ZIP 48469. Map them, with each precinct's share of the ZIP's residents.

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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:48469")

ZIP 48469 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.