Boundary Atlas

ZIP code 45883: St. Henry, OH

ZIP code 45883 is in St. Henry (64% of residents), in Mercer County (100%) and Darke County (0.2%), Ohio. 36% of its residents live outside city limits. It is in Ohio's 4th congressional district (100%) and Ohio's 8th congressional district (0.2%). Its state senate district is State Senate District 12; its state house district is State House District 84.

4,026residents (2020 Census)
36.4 sq miland area
1cities and towns
2congressional districts
9voting precincts

See it on the mapAll of Ohio

City and county

City or townShare of ZIP residents
St. Henry64%

CountyShare of ZIP residents
Mercer County100%
Darke County0.2%

Town or county subdivisionShare of ZIP residents
Granville township96%
Butler township2.0%
Recovery township1.7%
Wabash township0.2%
Allen townshipland only

Congressional districts

Congressional districtShare of ZIP residents
Ohio's 4th congressional district (OH-04)100%
Ohio's 8th congressional district (OH-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 12100%

State house districtShare of ZIP residents
State House District 84100%

Voting precincts

9 voting precincts overlap ZIP 45883. 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:45883")

ZIP 45883 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.