ZIP code 45123: Greenfield, OH
ZIP code 45123 is in Greenfield (49% of residents), in Highland County (76%), Ross County (14%) and Fayette County (9.2%), Ohio. 51% of its residents live outside city limits. It is in Ohio's 15th congressional district (86%) and Ohio's 2nd congressional district (14%). Its state senate district is State Senate District 17; its state house district is State House District 91.
City and county
| City or town | Share of ZIP residents |
|---|---|
| Greenfield | 49% |
| Good Hope | 0.4% |
| County | Share of ZIP residents |
|---|---|
| Highland County | 76% |
| Ross County | 14% |
| Fayette County | 9.2% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Madison township | 69% |
| Buckskin township | 12% |
| Paint township | 6.2% |
| Perry township | 5.9% |
| Wayne township | 3.2% |
| Paint township | 2.1% |
| Fairfield township | 0.8% |
| Green township | 0.2% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Ohio's 15th congressional district (OH-15) | 86% |
| Ohio's 2nd congressional district (OH-02) | 14% |
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
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (OH-15) | Mike Carey (R) | 202-225-2015 | 86% |
| U.S. Representative (OH-02) | David J. Taylor (R) | 202-225-3164 | 14% |
| U.S. Senator | Bernie Moreno (R) | 202-224-2315 | statewide |
| U.S. Senator | Jon Husted (R) | 202-224-3353 | statewide |
| State Senator (State Senate District 17) | Shane Wilkin (R) | 100% | |
| State Representative (State House District 91) | Bob Peterson (R) | 100% |
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
- Greenfield website: http://www.greenfieldohio.net
- Greenfield laws: search for the Greenfield, Ohio code of ordinances
- Highland County website: http://co.highland.oh.us/
- Highland County laws: search for the Highland County, Ohio code of ordinances
- Ross County laws: search for the Ross County, Ohio code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 17 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 91 | 100% |
Voting precincts
12 voting precincts overlap ZIP 45123. 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:45123")
ZIP 45123 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.