Boundary Atlas

ZIP code 48655: St. Charles, MI

ZIP code 48655 is in St. Charles (33% of residents), in Saginaw County, Michigan. 67% of its residents live outside city limits. It is in Michigan's 8th congressional district. Its state senate districts are State Senate District 26 (69%) and State Senate District 34 (31%); its state house district is State House District 93.

6,033residents (2020 Census)
93.9 sq miland area
1cities and towns
1congressional district
7voting precincts

See it on the mapAll of Michigan

City and county

City or townShare of ZIP residents
St. Charles33%

CountyShare of ZIP residents
Saginaw County100%

Town or county subdivisionShare of ZIP residents
St. Charles township48%
Swan Creek township18%
Brant township13%
Fremont township12%
Albee township3.9%
Lakefield township3.6%
Marion township2.2%

Congressional district

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 2669%
State Senate District 3431%

State house districtShare of ZIP residents
State House District 93100%

Voting precincts

7 voting precincts overlap ZIP 48655. 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:48655")

ZIP 48655 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.