Boundary Atlas

Thornton, Colorado

Thornton is a city in Adams County, Colorado, with 141,731 residents in 2020. It is in Colorado's 8th congressional district. It spans 3 state house districts. Its state senate district is State Senate District 24.

141,731residents (2020 Census)
36.7 sq miland area
7ZIP codes
1congressional district

County

CountyShare of residents
Adams County100%

Congressional district

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

Elected officials

OfficeMemberContactShare of residents
MayorJanifer Kulmanncitywide
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 24)Kyle Mullica (Democratic)100%
State Representative (State House District 31)Jacque Phillips (Democratic)57%
State Representative (State House District 34)Jenny Willford (Democratic)35%
State Representative (State House District 33)Kenny Nguyen (Democratic)8.6%

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 residents
State Senate District 24100%

State house districtShare of residents
State House District 3157%
State House District 3435%
State House District 338.6%

ZIP codes

Percentages mark ZIPs only partly in Thornton: the share of that ZIP's residents living in it.

Get this in your AI agent

Your agent can get Thornton's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:place:0877290")

Thornton here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.