Boundary Atlas

ZIP code 45840: Findlay, OH

ZIP code 45840 is in Findlay (73% of residents), in Hancock County, Ohio. 27% of its residents live outside city limits. It is in Ohio's 5th congressional district. Its state senate district is State Senate District 1; its state house district is State House District 83.

54,901residents (2020 Census)
166.5 sq miland area
1cities and towns
1congressional district
48voting precincts

See it on the mapAll of Ohio

City and county

City or townShare of ZIP residents
Findlay73%

CountyShare of ZIP residents
Hancock County100%

Town or county subdivisionShare of ZIP residents
Findlay city73%
Liberty township13%
Marion township5.6%
Allen township2.9%
Eagle township1.4%
Biglick township1.1%
Jackson township1.0%
Cass township0.8%
Blanchard township0.6%
Portage township0.3%
Amanda township0.1%

Congressional district

Congressional districtShare of ZIP residents
Ohio's 5th congressional district (OH-05)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 1100%

State house districtShare of ZIP residents
State House District 83100%

Voting precincts

48 voting precincts overlap ZIP 45840. 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:45840")

ZIP 45840 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.