Boundary Atlas

ZIP code 80534: Johnstown, CO

ZIP code 80534 is in Johnstown (92% of residents), in Weld County (73%) and Larimer County (27%), Colorado. 7.6% of its residents live outside city limits. It is in Colorado's 8th congressional district. Its state senate district is State Senate District 23; its state house districts are State House District 64 (71%), State House District 65 (29%) and State House District 48 (<0.1%).

18,785residents (2020 Census)
48.1 sq miland area
2cities and towns
1congressional district
15voting precincts

See it on the mapAll of Colorado

City and county

City or townShare of ZIP residents
Johnstown92%
Berthoud0.1%

CountyShare of ZIP residents
Weld County73%
Larimer County27%

Town or county subdivisionShare of ZIP residents
Johnstown-Milliken CCD73%
Loveland CCD27%

Congressional district

Congressional districtShare of ZIP residents
Colorado's 8th congressional district (CO-08)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (CO-08)Gabe Evans (R)202-225-5625100%
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 23)Barbara Kirkmeyer (R)100%
State Representative (State House District 64)Scott Slaugh (R)71%
State Representative (State House District 65)Lori Garcia Sander (R)29%
State Representative (State House District 48)Carlos Barron (R)<0.1%

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 23100%

State house districtShare of ZIP residents
State House District 6471%
State House District 6529%
State House District 48<0.1%

Voting precincts

15 voting precincts overlap ZIP 80534. Map them, with each precinct's share of the ZIP's residents.

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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:80534")

ZIP 80534 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.