Boundary Atlas

ZIP code 45801: Lima, OH

ZIP code 45801 is in Lima (63% of residents), in Allen County, Ohio. 37% of its residents live outside city limits. It is in Ohio's 4th congressional district. Its state senate district is State Senate District 12; its state house district is State House District 78.

22,819residents (2020 Census)
45.7 sq miland area
1cities and towns
1congressional district
25voting precincts

See it on the mapAll of Ohio

City and county

City or townShare of ZIP residents
Lima63%

CountyShare of ZIP residents
Allen County100%

Town or county subdivisionShare of ZIP residents
Lima city63%
Bath township25%
American township6.0%
Jackson township5.6%
Auglaize township0.3%
Sugar Creek township0.2%
Monroe township<0.1%

Congressional district

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 12100%

State house districtShare of ZIP residents
State House District 78100%

Voting precincts

25 voting precincts overlap ZIP 45801. 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:45801")

ZIP 45801 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.