Colorado State House District 10

State Legislative District Profile (Lower Chamber)

Overview

District ID
co-hd-010
State
Colorado
Chamber
Lower chamber
District Code
010
Land Area
24.3 sq mi
Water Area
1.16 sq mi

Boundary

Boundary of Colorado State House District 10

Boundary as GeoJSON

Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.

Counties

CountyOverlapShare of district landShare of county land
Boulder County24.30 sq mi100.0%3.3%

Showing all 1 county

Places

PlaceOverlapShare of district landShare of place land
Boulder city18.39 sq mi75.7%68.4%
Gunbarrel CDP0.01 sq mi<0.1%0.1%

Showing all 2 places

Overlapping Congressional Districts

Congressional districtPopulation in bothShare of this district's populationShare of the congressional district's populationShare of this district's land
CO District 290,232100.0%12.5%100.0%

Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).

Voters

Registered Voters
59,086
Active Voters
48,990 (82.9%)

Party Registration

PartyVotersShare
Democratic25,86543.8%
Republican3,1345.3%
Unaffiliated28,78748.7%
Other parties1,3002.2%
No party recorded00.0%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202625,000 (42.3%)0 (0.0%)0 (0.0%)
2023–202443,289 (73.3%)11,813 (20.0%)1,258 (2.1%)
2021–202233,113 (56.0%)9,202 (15.6%)848 (1.4%)
2019–202034,460 (58.3%)15,843 (26.8%)1,241 (2.1%)
2017–201826,930 (45.6%)9,987 (16.9%)893 (1.5%)
2015–201625,631 (43.4%)5,563 (9.4%)775 (1.3%)
2013–201419,546 (33.1%)4,139 (7.0%)827 (1.4%)
2011–201220,902 (35.4%)4,232 (7.2%)714 (1.2%)

Turnout counts today's registered voters with a counted ballot in the cycle's elections (the odd and even year), as a share of today's registered voters. Voters who have since left the rolls are not counted.

Browse the voter list for this district (premium access; sign-in required)

Source: Civitech voter file snapshot as of 01/20/2026. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".

Demographics

Total Population
87,951 (± 1,181)
Median Age
27.0
Median Household Income
$75,792 (± $4,475)
High School Graduate or Higher (age 25+)
97.0%
Bachelor's Degree or Higher (age 25+)
75.0%

Population by Age

GroupPeopleShare
Under 188,6769.9%
18 to 6469,34878.8%
65 and over9,92711.3%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)10,42411.9%
White, not Hispanic66,95876.1%
Black, not Hispanic8701.0%
Asian, not Hispanic5,2976.0%
American Indian / Alaska Native, not Hispanic1040.1%
Native Hawaiian / Pacific Islander, not Hispanic330.0%
Some other race, not Hispanic2770.3%
Two or more races, not Hispanic3,9884.5%

Source: U.S. Census Bureau, American Community Survey 2020-2024 ACS 5-year estimates (tables B01001, B01002, B01003, B03002, B15003, B19013) for this state legislative district. Estimates are survey-based; ± figures are 90% margins of error.

Citizen Voting Age Population

Total Citizen Population
82,542
Citizen Voting Age Population (CVAP)
74,144

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic73,24588.7%
Hispanic9,29511.3%
White66,15980.2%
Black8241.0%
Asian3,2173.9%
American Indian / Alaska Native1010.1%
Native Hawaiian / Pacific Islander340.0%
Two or More Races1020.1%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic66,64889.9%
Hispanic7,49610.1%
White60,32481.4%
Black1,4502.0%
Asian4,2615.7%
American Indian / Alaska Native4910.7%
Native Hawaiian / Pacific Islander330.0%
Two or More Races910.1%

Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).