ZIP code 43346: Roundhead, OH
ZIP code 43346 is in Hardin County, Ohio, outside any city or Census-designated place. It is in Ohio's 4th congressional district. Its state senate district is State Senate District 1; its state house district is State House District 83.
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Hardin County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Roundhead township | 100% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Ohio's 4th congressional district (OH-04) | 100% |
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 1 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 83 | 100% |
Voting precincts
1 voting precinct overlap ZIP 43346. 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:43346")
ZIP 43346 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.