Boundary Atlas

ZIP code 80643: Keenesburg, CO

ZIP code 80643 is in Keenesburg (35% of residents), in Weld County (84%) and Adams County (16%), Colorado. 65% of its residents live outside city limits. It is in Colorado's 4th congressional district. Its state senate districts are State Senate District 1 (84%) and State Senate District 21 (16%); its state house districts are State House District 48 (75%), State House District 56 (16%) and State House District 63 (8.6%).

3,599residents (2020 Census)
216.5 sq miland area
2cities and towns
1congressional district
8voting precincts

See it on the mapAll of Colorado

City and county

City or townShare of ZIP residents
Keenesburg35%
Hudson0.3%

CountyShare of ZIP residents
Weld County84%
Adams County16%

Town or county subdivisionShare of ZIP residents
Keenesburg-Hudson CCD84%
East Adams CCD16%

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 184%
State Senate District 2116%

State house districtShare of ZIP residents
State House District 4875%
State House District 5616%
State House District 638.6%

Voting precincts

8 voting precincts overlap ZIP 80643. 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:80643")

ZIP 80643 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.