Boundary Atlas

ZIP code 43112: Greenfield, OH

ZIP code 43112 is in Carroll (9.9% of residents), in Fairfield County, Ohio. 90% of its residents live outside city limits. It is in Ohio's 12th congressional district. Its state senate district is State Senate District 20; its state house districts are State House District 73 (55%) and State House District 69 (45%).

5,052residents (2020 Census)
35.4 sq miland area
1cities and towns
1congressional district
9voting precincts

See it on the mapAll of Ohio

City and county

City or townShare of ZIP residents
Carroll9.9%

CountyShare of ZIP residents
Fairfield County100%

Town or county subdivisionShare of ZIP residents
Greenfield township45%
Bloom township45%
Violet township6.2%
Liberty township3.5%

Congressional district

Congressional districtShare of ZIP residents
Ohio's 12th congressional district (OH-12)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (OH-12)Troy Balderson (R)202-225-5355100%
U.S. SenatorBernie Moreno (R)202-224-2315statewide
U.S. SenatorJon Husted (R)202-224-3353statewide
State Senator (State Senate District 20)Tim Schaffer (R)100%
State Representative (State House District 73)Jeff LaRe (R)55%
State Representative (State House District 69)Kevin Miller (R)45%

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 20100%

State house districtShare of ZIP residents
State House District 7355%
State House District 6945%

Voting precincts

9 voting precincts overlap ZIP 43112. 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:43112")

ZIP 43112 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.