Boundary Atlas

ZIP code 80031: Westminster, CO

ZIP code 80031 is in Westminster (86% of residents) and Shaw Heights (14%), in Adams County (94%) and Jefferson County (6.4%), Colorado. It is in Colorado's 8th congressional district (94%) and Colorado's 7th congressional district (6.4%). Its state senate districts are State Senate District 25 (81%), State Senate District 21 (12%) and State Senate District 19 (6.4%); its state house districts are State House District 29 (68%) and State House District 35 (32%).

37,254residents (2020 Census)
8.4 sq miland area
3cities and towns
2congressional districts
26voting precincts

See it on the mapAll of Colorado

City and county

City or townShare of ZIP residents
Westminster86%
Shaw Heights14%
Sherrelwood0.5%

CountyShare of ZIP residents
Adams County94%
Jefferson County6.4%

Town or county subdivisionShare of ZIP residents
West Adams CCD94%
Northeast Jefferson CCD6.4%

Congressional districts

Congressional districtShare of ZIP residents
Colorado's 8th congressional district (CO-08)94%
Colorado's 7th congressional district (CO-07)6.4%

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

OfficeMemberContactShare of residents
MayorNancy McNally86%
U.S. Representative (CO-08)Gabe Evans (R)202-225-562594%
U.S. Representative (CO-07)Brittany Pettersen (D)202-225-26456.4%
U.S. SenatorJohn W. Hickenlooper (D)202-224-5941 · contact formstatewide
U.S. SenatorMichael F. Bennet (D)202-224-5852 · contact formstatewide
State Senator (State Senate District 25)William Lindstedt (Democratic)81%
State Senator (State Senate District 21)Adrienne Benavidez (Democratic)12%
State Senator (State Senate District 19)Lindsey Daugherty (Democratic)6.4%
State Representative (State House District 29)Lori Goldstein (Democratic)68%
State Representative (State House District 35)Lorena García (Democratic)32%

From Wikidata (community-maintained); confirm on the city's website.

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); Mayors: Wikidata (CC0).

Local government

State legislative districts

State senate districtShare of ZIP residents
State Senate District 2581%
State Senate District 2112%
State Senate District 196.4%

State house districtShare of ZIP residents
State House District 2968%
State House District 3532%

Voting precincts

26 voting precincts overlap ZIP 80031. 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:80031")

ZIP 80031 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.