ZIP code 50612: Geneseo, IA
ZIP code 50612 is in Tama County (89%) and Black Hawk County (11%), Iowa, outside any city or Census-designated place. It is in Iowa's 2nd congressional district. Its state senate district is State Senate District 38; its state house district is State House District 76.
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Tama County | 89% |
| Black Hawk County | 11% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Geneseo township | 72% |
| Buckingham township | 17% |
| Eagle township | 11% |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| Iowa's 2nd congressional district (IA-02) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (IA-02) | Ashley Hinson (R) | 202-225-2911 | 100% |
| U.S. Senator | Chuck Grassley (R) | 202-224-3744 · contact form | statewide |
| U.S. Senator | Joni Ernst (R) | 202-224-3254 · contact form | statewide |
| State Senator (State Senate District 38) | Dave Sires (R) | 100% | |
| State Representative (State House District 76) | Derek Wulf (R) | 100% |
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
- Tama County website: http://www.tamacounty.org
- Tama County laws: search for the Tama County, Iowa code of ordinances
- Black Hawk County website: http://www.co.black-hawk.ia.us
- Black Hawk County laws: search for the Black Hawk County, Iowa code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 38 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 76 | 100% |
Voting precincts
3 voting precincts overlap ZIP 50612. 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:50612")
ZIP 50612 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.