Overview
- District ID
- co-hd-040
- State
- Colorado
- Chamber
- Lower chamber
- District Code
- 040
- Land Area
- 19.2 sq mi
- Water Area
- 1.56 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 |
|---|
| Arapahoe County | 19.21 sq mi | 100.0% | 2.4% |
Showing all 1 county
Places
| Place | Overlap | Share of district land | Share of place land |
|---|
| Aurora city | 10.71 sq mi | 55.8% | 6.5% |
Showing all 1 place
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 6 | 74,051 | 82.2% | 10.3% | 85.3% |
| CO District 4 | 16,036 | 17.8% | 2.2% | 14.7% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 66,002
- Active Voters
- 59,946 (90.8%)
Party Registration
| Party | Voters | Share |
|---|
| Democratic | 19,035 | 28.8% |
| Republican | 11,333 | 17.2% |
| Unaffiliated | 33,829 | 51.3% |
| Other parties | 1,805 | 2.7% |
| No party recorded | 0 | 0.0% |
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2025–2026 | 22,031 (33.4%) | 0 (0.0%) | 0 (0.0%) |
| 2023–2024 | 45,527 (69.0%) | 6,527 (9.9%) | 5,142 (7.8%) |
| 2021–2022 | 33,625 (50.9%) | 4,973 (7.5%) | 3,837 (5.8%) |
| 2019–2020 | 43,272 (65.6%) | 10,636 (16.1%) | 5,465 (8.3%) |
| 2017–2018 | 30,438 (46.1%) | 5,395 (8.2%) | 3,399 (5.1%) |
| 2015–2016 | 32,772 (49.7%) | 2,811 (4.3%) | 2,629 (4.0%) |
| 2013–2014 | 21,821 (33.1%) | 2,093 (3.2%) | 2,638 (4.0%) |
| 2011–2012 | 26,574 (40.3%) | 1,612 (2.4%) | 1,813 (2.7%) |
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
- 88,145 (± 2,692)
- Median Age
- 38.2
- Median Household Income
- $107,171 (± $4,116)
- High School Graduate or Higher (age 25+)
- 92.1%
- Bachelor's Degree or Higher (age 25+)
- 38.6%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 19,749 | 22.4% |
| 18 to 64 | 56,406 | 64.0% |
| 65 and over | 11,990 | 13.6% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 18,990 | 21.5% |
| White, not Hispanic | 45,659 | 51.8% |
| Black, not Hispanic | 11,000 | 12.5% |
| Asian, not Hispanic | 5,605 | 6.4% |
| American Indian / Alaska Native, not Hispanic | 250 | 0.3% |
| Native Hawaiian / Pacific Islander, not Hispanic | 56 | 0.1% |
| Some other race, not Hispanic | 587 | 0.7% |
| Two or more races, not Hispanic | 5,998 | 6.8% |
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
- 82,657
- Citizen Voting Age Population (CVAP)
- 63,216
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 66,236 | 80.1% |
| Hispanic | 16,421 | 19.9% |
| White | 46,319 | 56.0% |
| Black | 10,140 | 12.3% |
| Asian | 4,572 | 5.5% |
| American Indian / Alaska Native | 228 | 0.3% |
| Native Hawaiian / Pacific Islander | 57 | 0.1% |
| Two or More Races | 1,053 | 1.3% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 53,331 | 84.4% |
| Hispanic | 9,884 | 15.6% |
| White | 38,759 | 61.3% |
| Black | 8,489 | 13.4% |
| Asian | 4,463 | 7.1% |
| American Indian / Alaska Native | 772 | 1.2% |
| Native Hawaiian / Pacific Islander | 49 | 0.1% |
| Two or More Races | 888 | 1.4% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
