Boundary Atlas

ZIP code 45231: Springfield, OH

ZIP code 45231 is in Finneytown (20% of residents), Mount Healthy (17%), North College Hill (9.2%), Northbrook (8.0%), Pleasant Run (7.2%), Mount Healthy Heights (7.0%), New Burlington (5.8%), Skyline Acres (3.3%) and Pleasant Hills (2.3%), in Hamilton County, Ohio. 21% of its residents live outside city limits. It is in Ohio's 8th congressional district (100%) and Ohio's 1st congressional district (0.4%). Its state senate districts are State Senate District 8 (99%), State Senate District 9 (0.4%) and State Senate District 7 (0.3%); its state house districts are State House District 29 (64%), State House District 27 (35%), State House District 25 (0.4%) and State House District 28 (0.3%).

41,934residents (2020 Census)
14.8 sq miland area
13cities and towns
2congressional districts
42voting precincts

See it on the mapAll of Ohio

City and county

City or townShare of ZIP residents
Finneytown20%
Mount Healthy17%
North College Hill9.2%
Northbrook8.0%
Pleasant Run7.2%
Mount Healthy Heights7.0%
New Burlington5.8%
Skyline Acres3.3%
Pleasant Hills2.3%
Wyoming0.5%
Cincinnati0.4%
Pleasant Run Farm0.3%
Northgate0.3%

CountyShare of ZIP residents
Hamilton County100%

Town or county subdivisionShare of ZIP residents
Springfield township49%
Colerain township25%
Mount Healthy city17%
North College Hill city9.2%
Wyoming city0.5%
Cincinnati city0.4%

Congressional districts

Congressional districtShare of ZIP residents
Ohio's 8th congressional district (OH-08)100%
Ohio's 1st congressional district (OH-01)0.4%

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.

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (OH-08)Warren Davidson (R)202-225-6205100%
U.S. Representative (OH-01)Greg Landsman (D)202-225-22160.4%
U.S. SenatorBernie Moreno (R)202-224-2315statewide
U.S. SenatorJon Husted (R)202-224-3353statewide
State Senator (State Senate District 8)Bill Blessing (R)99%
State Senator (State Senate District 9)Catherine Ingram (Democratic)0.4%
State Senator (State Senate District 7)Steve Wilson (R)0.3%
State Representative (State House District 29)Cindy Abrams (R)64%
State Representative (State House District 27)Rachel Baker (Democratic)35%
State Representative (State House District 25)Cecil Thomas (Democratic)0.4%
State Representative (State House District 28)Karen Brownlee (Democratic)0.3%

Elected in 2024 under OH's previous congressional map; this district's lines changed for the 120th Congress (seated January 3, 2027).

Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).

Local government

State legislative districts

State senate districtShare of ZIP residents
State Senate District 899%
State Senate District 90.4%
State Senate District 70.3%

State house districtShare of ZIP residents
State House District 2964%
State House District 2735%
State House District 250.4%
State House District 280.3%

Voting precincts

42 voting precincts overlap ZIP 45231. 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:45231")

ZIP 45231 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.