Boundary Atlas

ZIP code 80129: Highlands Ranch, CO

ZIP code 80129 is in Highlands Ranch (98% of residents) and Littleton (1.8%), in Douglas County (100%) and Arapahoe County (<0.1%), Colorado. It is in Colorado's 4th congressional district. Its state senate district is State Senate District 30; its state house districts are State House District 43 (96%) and State House District 39 (3.7%).

29,703residents (2020 Census)
7.0 sq miland area
2cities and towns
1congressional district
19voting precincts

See it on the mapAll of Colorado

City and county

City or townShare of ZIP residents
Highlands Ranch98%
Littleton1.8%

CountyShare of ZIP residents
Douglas County100%
Arapahoe Countyland only

Town or county subdivisionShare of ZIP residents
Sedalia CCD100%
Southwest Arapahoe CCDland only

Congressional district

Congressional districtShare of ZIP residents
Colorado's 4th congressional district (CO-04)100%
Colorado's 6th congressional district (CO-06)land only

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (CO-04)Lauren Boebert (R)202-225-4761100%
U.S. Representative (CO-06)Jason Crow (D)202-225-7882<0.1%
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 30)John Carson (R)100%
State Senator (State Senate District 16)Chris Kolker (Democratic)<0.1%
State Representative (State House District 43)Bob Marshall (Democratic)96%
State Representative (State House District 39)Brandi Bradley (R)3.7%
State Representative (State House District 38)Gretchen Rydin (Democratic)<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 30100%
State Senate District 16land only

State house districtShare of ZIP residents
State House District 4396%
State House District 393.7%
State House District 38land only

Voting precincts

19 voting precincts overlap ZIP 80129. 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:

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ZIP 80129 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.