Overview
- District ID
- co-sd-020
- State
- Colorado
- Chamber
- Upper chamber (state senate)
- District Code
- 020
- Land Area
- 272.1 sq mi
- Water Area
- 2.68 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
| County | Overlap | Share of district land | Share of county land |
|---|
| Jefferson County | 272.05 sq mi | 100.0% | 35.6% |
Showing all 1 county
Places
Showing all 13 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 7 | 166,058 | 98.9% | 23.0% | 88.0% |
| CO District 2 | 1,853 | 1.1% | 0.3% | 12.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 138,333
- Active Voters
- 127,885 (92.4%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 34,589 | 25.0% |
| Republican | 30,046 | 21.7% |
| Unaffiliated | 70,753 | 51.1% |
| Other parties | 2,945 | 2.1% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 59,792 (43.2%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 110,908 (80.2%) | 15,840 (11.5%) | 16,392 (11.8%) |
| 2021–2022 | 91,395 (66.1%) | 11,639 (8.4%) | 12,720 (9.2%) |
| 2019–2020 | 102,346 (74.0%) | 24,175 (17.5%) | 16,985 (12.3%) |
| 2017–2018 | 80,976 (58.5%) | 14,148 (10.2%) | 10,797 (7.8%) |
| 2015–2016 | 81,941 (59.2%) | 6,658 (4.8%) | 8,646 (6.3%) |
| 2013–2014 | 61,997 (44.8%) | 5,151 (3.7%) | 9,492 (6.9%) |
| 2011–2012 | 68,787 (49.7%) | 4,425 (3.2%) | 6,380 (4.6%) |
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
- 166,424 (± 3,446)
- Median Age
- 42.5
- Median Household Income
- $125,635 (± $3,884)
- High School Graduate or Higher (age 25+)
- 96.8%
- Bachelor's Degree or Higher (age 25+)
- 56.9%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 32,579 | 19.6% |
| 18 to 64 | 102,439 | 61.6% |
| 65 and over | 31,406 | 18.9% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 22,107 | 13.3% |
| White, not Hispanic | 129,867 | 78.0% |
| Black, not Hispanic | 1,170 | 0.7% |
| Asian, not Hispanic | 5,567 | 3.3% |
| American Indian / Alaska Native, not Hispanic | 346 | 0.2% |
| Native Hawaiian / Pacific Islander, not Hispanic | 50 | 0.0% |
| Some other race, not Hispanic | 901 | 0.5% |
| Two or more races, not Hispanic | 6,416 | 3.9% |
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
- 163,368
- Citizen Voting Age Population (CVAP)
- 130,970
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 142,400 | 87.2% |
| Hispanic | 20,976 | 12.8% |
| White | 131,837 | 80.7% |
| Black | 1,178 | 0.7% |
| Asian | 4,365 | 2.7% |
| American Indian / Alaska Native | 365 | 0.2% |
| Native Hawaiian / Pacific Islander | 52 | 0.0% |
| Two or More Races | 334 | 0.2% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 116,071 | 88.6% |
| Hispanic | 14,898 | 11.4% |
| White | 108,598 | 82.9% |
| Black | 1,519 | 1.2% |
| Asian | 4,513 | 3.4% |
| American Indian / Alaska Native | 1,227 | 0.9% |
| Native Hawaiian / Pacific Islander | 49 | 0.0% |
| Two or More Races | 269 | 0.2% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
