ZIP code 89421: Fort McDermitt, NV
ZIP code 89421 is in Fort McDermitt (58% of residents) and McDermitt (27%), in Humboldt County (89%) and Malheur County (11%), Nevada. 15% of its residents live outside city limits. It is in Nevada's 2nd congressional district (89%) and Oregon's 2nd congressional district (11%). Its state senate districts are State Senate District 14 (89%) and State Senate District 30 (11%); its state house districts are Assembly District 32 (89%) and State House District 60 (11%).
See it on the mapAll of Nevada
City and county
| City or town | Share of ZIP residents |
|---|---|
| Fort McDermitt | 58% |
| McDermitt | 27% |
| County | Share of ZIP residents |
|---|---|
| Humboldt County | 89% |
| Malheur County | 11% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| McDermitt CCD | 89% |
| Jordan Valley CCD | 11% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Nevada's 2nd congressional district (NV-02) | 89% |
| Oregon's 2nd congressional district (OR-02) | 11% |
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.
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 14 | 89% |
| State Senate District 30 | 11% |
| State house district | Share of ZIP residents |
|---|---|
| Assembly District 32 | 89% |
| State House District 60 | 11% |
Voting precincts
2 voting precincts overlap ZIP 89421. It also crosses into OR. 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:89421")
ZIP 89421 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.