Boundary Atlas

ZIP code 48880: St. Louis, MI

ZIP code 48880 is in St. Louis (67% of residents), in Gratiot County (90%), Midland County (8.0%) and Isabella County (2.1%), Michigan. 33% of its residents live outside city limits. It is in Michigan's 2nd congressional district (100%) and Michigan's 8th congressional district (0.2%). Its state senate district is State Senate District 34; its state house districts are State House District 92 (92%) and State House District 95 (8.0%).

10,495residents (2020 Census)
74.8 sq miland area
1cities and towns
2congressional districts
7voting precincts

See it on the mapAll of Michigan

City and county

City or townShare of ZIP residents
St. Louis67%

CountyShare of ZIP residents
Gratiot County90%
Midland County8.0%
Isabella County2.1%

Town or county subdivisionShare of ZIP residents
St. Louis city67%
Bethany township14%
Pine River township8.0%
Jasper township7.8%
Coe township2.1%
Emerson township1.0%
Porter township0.2%

Congressional districts

Congressional districtShare of ZIP residents
Michigan's 2nd congressional district (MI-02)100%
Michigan's 8th congressional district (MI-08)0.2%

This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.

State legislative districts

State senate districtShare of ZIP residents
State Senate District 34100%

State house districtShare of ZIP residents
State House District 9292%
State House District 958.0%

Voting precincts

7 voting precincts overlap ZIP 48880. 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:48880")

ZIP 48880 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.