Boundary Atlas

ZIP code 81045: Haswell, CO

ZIP code 81045 is in Haswell (50% of residents), in Kiowa County (72%), Cheyenne County (21%) and Lincoln County (6.4%), Colorado. 50% of its residents live outside city limits. It is in Colorado's 4th congressional district. Its state senate district is State Senate District 35; its state house districts are State House District 47 (72%) and State House District 56 (28%).

141residents (2020 Census)
408.8 sq miland area
1cities and towns
1congressional district
4voting precincts

See it on the mapAll of Colorado

City and county

City or townShare of ZIP residents
Haswell50%

CountyShare of ZIP residents
Kiowa County72%
Cheyenne County21%
Lincoln County6.4%

Town or county subdivisionShare of ZIP residents
Haswell CCD72%
Kit Carson CCD21%
Karval CCD6.4%

Congressional district

Congressional districtShare of ZIP residents
Colorado's 4th congressional district (CO-04)100%

State legislative districts

State senate districtShare of ZIP residents
State Senate District 35100%

State house districtShare of ZIP residents
State House District 4772%
State House District 5628%

Voting precincts

4 voting precincts overlap ZIP 81045. 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:81045")

ZIP 81045 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.