Boundary Atlas

ZIP code 48867: Owosso, MI

ZIP code 48867 is in Owosso (53% of residents) and Middletown (2.9%), in Shiawassee County, Michigan. 44% of its residents live outside city limits. It is in Michigan's 7th congressional district. Its state senate district is State Senate District 28; its state house district is State House District 71.

27,596residents (2020 Census)
136.0 sq miland area
4cities and towns
1congressional district
16voting precincts

See it on the mapAll of Michigan

City and county

City or townShare of ZIP residents
Owosso53%
Middletown2.9%
Henderson0.6%
Corunna<0.1%

CountyShare of ZIP residents
Shiawassee County100%

Town or county subdivisionShare of ZIP residents
Owosso city53%
Owosso charter township17%
Caledonia charter township12%
Bennington township9.4%
New Haven township3.6%
Rush township2.7%
Shiawassee township1.5%
Middlebury township0.7%
Corunna city<0.1%
Fairfield township<0.1%

Congressional district

Congressional districtShare of ZIP residents
Michigan's 7th congressional district (MI-07)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 28100%

State house districtShare of ZIP residents
State House District 71100%

Voting precincts

16 voting precincts overlap ZIP 48867. 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:48867")

ZIP 48867 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.