ZIP code 81638: Moffat County, CO
ZIP code 81638 is in Moffat County (80%) and Routt County (20%), Colorado, outside any city or Census-designated place. It is in Colorado's 3rd congressional district (80%) and Colorado's 2nd congressional district (20%). Its state senate district is State Senate District 8; its state house district is State House District 26.
See it on the mapAll of Colorado
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Moffat County | 80% |
| Routt County | 20% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Craig CCD | 80% |
| Hayden CCD | 20% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Colorado's 3rd congressional district (CO-03) | 80% |
| Colorado's 2nd congressional district (CO-02) | 20% |
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 (CO-03) | Jeff Hurd (R) | 202-225-4676 | 80% |
| U.S. Representative (CO-02) | Joe Neguse (D) | 202-225-2161 | 20% |
| U.S. Senator | John W. Hickenlooper (D) | 202-224-5941 · contact form | statewide |
| U.S. Senator | Michael F. Bennet (D) | 202-224-5852 · contact form | statewide |
| State Senator (State Senate District 8) | Dylan Roberts (Democratic) | 100% | |
| State Representative (State House District 26) | Meghan Lukens (Democratic) | 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
- Moffat County laws: search for the Moffat County, Colorado code of ordinances
- Routt County website: http://www.co.routt.co.us
- Routt County laws: search for the Routt County, Colorado code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 8 | 100% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 26 | 100% |
Voting precincts
5 voting precincts overlap ZIP 81638. 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:81638")
ZIP 81638 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.