Boundary Atlas

ZIP code 48860: Muir, MI

ZIP code 48860 is in Muir (49% of residents), in Ionia County, Michigan. 51% of its residents live outside city limits. It is in Michigan's 2nd congressional district. Its state senate district is State Senate District 33; its state house districts are State House District 93 (98%) and State House District 78 (2.1%).

1,309residents (2020 Census)
28.2 sq miland area
1cities and towns
1congressional district
3voting precincts

See it on the mapAll of Michigan

City and county

City or townShare of ZIP residents
Muir49%

CountyShare of ZIP residents
Ionia County100%

Town or county subdivisionShare of ZIP residents
Lyons township75%
North Plains township23%
Ronald township2.1%

Congressional district

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 33100%

State house districtShare of ZIP residents
State House District 9398%
State House District 782.1%

Voting precincts

3 voting precincts overlap ZIP 48860. 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:48860")

ZIP 48860 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.