Overview
- District ID
- co-sd-023
- State
- Colorado
- Chamber
- Upper chamber (state senate)
- District Code
- 023
- Land Area
- 404.6 sq mi
- Water Area
- 12.6 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 2 counties
Places
Showing all 14 places
Overlapping Congressional Districts
| Congressional district | Population in both | Share of this district's population | Share of the congressional district's population | Share of this district's land |
|---|
| CO District 8 | 90,512 | 56.3% | 12.5% | 65.5% |
| CO District 4 | 37,798 | 23.5% | 5.2% | 22.6% |
| CO District 2 | 32,425 | 20.2% | 4.5% | 11.9% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 147,970
- Active Voters
- 136,093 (92.0%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 24,615 | 16.6% |
| Republican | 45,004 | 30.4% |
| Unaffiliated | 74,935 | 50.6% |
| Other parties | 3,416 | 2.3% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 53,689 (36.3%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 114,068 (77.1%) | 9,921 (6.7%) | 22,611 (15.3%) |
| 2021–2022 | 85,914 (58.1%) | 6,810 (4.6%) | 15,190 (10.3%) |
| 2019–2020 | 100,876 (68.2%) | 14,701 (9.9%) | 21,941 (14.8%) |
| 2017–2018 | 74,930 (50.6%) | 7,827 (5.3%) | 11,239 (7.6%) |
| 2015–2016 | 77,960 (52.7%) | 3,605 (2.4%) | 8,710 (5.9%) |
| 2013–2014 | 54,224 (36.6%) | 3,101 (2.1%) | 9,615 (6.5%) |
| 2011–2012 | 63,077 (42.6%) | 2,436 (1.6%) | 6,254 (4.2%) |
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
- 181,109 (± 2,545)
- Median Age
- 37.4
- Median Household Income
- $125,269 (± $3,881)
- High School Graduate or Higher (age 25+)
- 94.6%
- Bachelor's Degree or Higher (age 25+)
- 47.1%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 45,627 | 25.2% |
| 18 to 64 | 109,945 | 60.7% |
| 65 and over | 25,537 | 14.1% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 32,070 | 17.7% |
| White, not Hispanic | 134,709 | 74.4% |
| Black, not Hispanic | 1,421 | 0.8% |
| Asian, not Hispanic | 4,875 | 2.7% |
| American Indian / Alaska Native, not Hispanic | 376 | 0.2% |
| Native Hawaiian / Pacific Islander, not Hispanic | 46 | 0.0% |
| Some other race, not Hispanic | 1,258 | 0.7% |
| Two or more races, not Hispanic | 6,354 | 3.5% |
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
- 176,167
- Citizen Voting Age Population (CVAP)
- 131,006
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 146,908 | 83.4% |
| Hispanic | 29,260 | 16.6% |
| White | 136,019 | 77.2% |
| Black | 1,519 | 0.9% |
| Asian | 4,408 | 2.5% |
| American Indian / Alaska Native | 378 | 0.2% |
| Native Hawaiian / Pacific Islander | 61 | 0.0% |
| Two or More Races | 486 | 0.3% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 112,559 | 85.9% |
| Hispanic | 18,449 | 14.1% |
| White | 105,490 | 80.5% |
| Black | 1,666 | 1.3% |
| Asian | 3,935 | 3.0% |
| American Indian / Alaska Native | 1,311 | 1.0% |
| Native Hawaiian / Pacific Islander | 63 | 0.0% |
| Two or More Races | 123 | 0.1% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
