Boundary Atlas

ZIP code 45239: White Oak, OH

ZIP code 45239 is in White Oak (40% of residents), Cincinnati (18%), North College Hill (17%), Monfort Heights (14%) and Groesbeck (9.1%), in Hamilton County, Ohio. It is in Ohio's 8th congressional district (77%) and Ohio's 1st congressional district (23%). Its state senate districts are State Senate District 8 (82%) and State Senate District 9 (18%); its state house districts are State House District 29 (57%), State House District 30 (25%) and State House District 25 (18%).

28,499residents (2020 Census)
6.3 sq miland area
6cities and towns
2congressional districts
24voting precincts

See it on the mapAll of Ohio

City and county

City or townShare of ZIP residents
White Oak40%
Cincinnati18%
North College Hill17%
Monfort Heights14%
Groesbeck9.1%
Skyline Acres0.2%

CountyShare of ZIP residents
Hamilton County100%

Town or county subdivisionShare of ZIP residents
Colerain township38%
Green township25%
Cincinnati city18%
North College Hill city17%
Springfield township1.7%

Congressional districts

Congressional districtShare of ZIP residents
Ohio's 8th congressional district (OH-08)77%
Ohio's 1st congressional district (OH-01)23%

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 882%
State Senate District 918%

State house districtShare of ZIP residents
State House District 2957%
State House District 3025%
State House District 2518%

Voting precincts

24 voting precincts overlap ZIP 45239. 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:45239")

ZIP 45239 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.