Boundary Atlas

ZIP code 45331: Greenville, OH

ZIP code 45331 is in Greenville (58% of residents) and Wayne Lakes (3.1%), in Darke County, Ohio. 39% of its residents live outside city limits. It is in Ohio's 8th congressional district. Its state senate districts are State Senate District 12 (85%) and State Senate District 5 (15%); its state house districts are State House District 84 (85%) and State House District 80 (15%).

22,213residents (2020 Census)
151.2 sq miland area
2cities and towns
1congressional district
26voting precincts

See it on the mapAll of Ohio

City and county

City or townShare of ZIP residents
Greenville58%
Wayne Lakes3.1%

CountyShare of ZIP residents
Darke County100%

Town or county subdivisionShare of ZIP residents
Greenville township77%
Neave township9.4%
Washington township3.8%
Adams township2.6%
Van Buren township2.3%
Liberty township1.9%
Richland township1.5%
Butler township0.9%
Franklin township0.8%
Brown township<0.1%

Congressional district

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 1285%
State Senate District 515%

State house districtShare of ZIP residents
State House District 8485%
State House District 8015%

Voting precincts

26 voting precincts overlap ZIP 45331. 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:45331")

ZIP 45331 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.