Overview
- District ID
- co-sd-012
- State
- Colorado
- Chamber
- Upper chamber (state senate)
- District Code
- 012
- Land Area
- 395 sq mi
- Water Area
- 1.76 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 8 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 5 | 167,890 | 99.6% | 23.3% | 99.7% |
| CO District 7 | 646 | 0.4% | 0.1% | 0.3% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 124,448
- Active Voters
- 103,848 (83.4%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 23,755 | 19.1% |
| Republican | 28,298 | 22.7% |
| Unaffiliated | 68,670 | 55.2% |
| Other parties | 3,725 | 3.0% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 39,690 (31.9%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 79,460 (63.8%) | 9,657 (7.8%) | 14,412 (11.6%) |
| 2021–2022 | 57,795 (46.4%) | 7,660 (6.2%) | 10,873 (8.7%) |
| 2019–2020 | 69,599 (55.9%) | 13,222 (10.6%) | 14,051 (11.3%) |
| 2017–2018 | 49,354 (39.7%) | 7,832 (6.3%) | 9,775 (7.9%) |
| 2015–2016 | 52,443 (42.1%) | 4,223 (3.4%) | 8,460 (6.8%) |
| 2013–2014 | 36,977 (29.7%) | 3,264 (2.6%) | 7,676 (6.2%) |
| 2011–2012 | 42,216 (33.9%) | 2,516 (2.0%) | 7,217 (5.8%) |
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
- 166,125 (± 3,238)
- Median Age
- 34.0
- Median Household Income
- $84,410 (± $2,608)
- High School Graduate or Higher (age 25+)
- 96.3%
- Bachelor's Degree or Higher (age 25+)
- 42.6%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 36,202 | 21.8% |
| 18 to 64 | 105,095 | 63.3% |
| 65 and over | 24,828 | 14.9% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 30,549 | 18.4% |
| White, not Hispanic | 110,545 | 66.5% |
| Black, not Hispanic | 9,555 | 5.8% |
| Asian, not Hispanic | 4,130 | 2.5% |
| American Indian / Alaska Native, not Hispanic | 375 | 0.2% |
| Native Hawaiian / Pacific Islander, not Hispanic | 585 | 0.4% |
| Some other race, not Hispanic | 907 | 0.5% |
| Two or more races, not Hispanic | 9,479 | 5.7% |
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
- 162,888
- Citizen Voting Age Population (CVAP)
- 126,871
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 133,576 | 82.0% |
| Hispanic | 29,314 | 18.0% |
| White | 111,734 | 68.6% |
| Black | 9,517 | 5.8% |
| Asian | 3,623 | 2.2% |
| American Indian / Alaska Native | 383 | 0.2% |
| Native Hawaiian / Pacific Islander | 525 | 0.3% |
| Two or More Races | 1,500 | 0.9% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 107,461 | 84.7% |
| Hispanic | 19,407 | 15.3% |
| White | 91,844 | 72.4% |
| Black | 8,938 | 7.0% |
| Asian | 3,948 | 3.1% |
| American Indian / Alaska Native | 1,557 | 1.2% |
| Native Hawaiian / Pacific Islander | 393 | 0.3% |
| Two or More Races | 839 | 0.7% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
