Colorado State Senate District 4

State Legislative District Profile (Upper Chamber)

Overview

District ID
co-sd-004
State
Colorado
Chamber
Upper chamber (state senate)
District Code
004
Land Area
7,390.3 sq mi
Water Area
32.9 sq mi

Boundary

Boundary of Colorado State Senate District 4

Boundary as GeoJSON

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

Counties

CountyOverlapShare of district landShare of county land
Park County2193.51 sq mi29.7%100.0%
Fremont County1533.87 sq mi20.8%100.0%
Chaffee County1013.41 sq mi13.7%100.0%
Custer County738.63 sq mi10.0%100.0%
Douglas County602.09 sq mi8.1%71.6%
Teller County556.70 sq mi7.5%99.9%
Lake County376.92 sq mi5.1%100.0%
Jefferson County374.64 sq mi5.1%49.0%

Showing all 8 counties

Places

PlaceOverlapShare of district landShare of place land
Coaldale CDP31.05 sq mi0.4%100.0%
Penrose CDP17.85 sq mi0.2%100.0%
Howard CDP16.74 sq mi0.2%100.0%
Silver Cliff town15.46 sq mi0.2%100.0%
Maysville CDP12.42 sq mi0.2%100.0%
Cañon City city12.39 sq mi0.2%99.8%
Guffey CDP8.67 sq mi0.1%100.0%
Perry Park CDP8.55 sq mi0.1%100.0%
Twin Lakes CDP6.73 sq mi0.1%100.0%
Woodland Park city6.61 sq mi0.1%100.0%
Park Center CDP6.55 sq mi0.1%100.0%
Florence city4.28 sq mi0.1%95.2%
Lincoln Park CDP3.79 sq mi0.1%100.0%
Williamsburg town3.53 sq mi<0.1%100.0%
Buena Vista town3.45 sq mi<0.1%99.4%
Poncha Springs town2.98 sq mi<0.1%96.9%
Franktown CDP2.94 sq mi<0.1%100.0%
Salida city2.79 sq mi<0.1%99.2%
Aspen Park CDP2.46 sq mi<0.1%100.0%
Leadville North CDP2.45 sq mi<0.1%100.0%
Rockvale town2.04 sq mi<0.1%99.4%
Midland CDP1.72 sq mi<0.1%100.0%
Larkspur town1.59 sq mi<0.1%100.0%
Louviers CDP1.58 sq mi<0.1%100.0%
Cripple Creek city1.52 sq mi<0.1%100.0%

Showing top 25 of 45 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 7152,58988.5%21.1%91.9%
CO District 419,91011.5%2.8%8.1%

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

Voters

Registered Voters
149,020
Active Voters
134,320 (90.1%)

Party Registration

PartyVotersShare
Democratic23,36315.7%
Republican49,33633.1%
Unaffiliated72,71948.8%
Other parties3,6022.4%
No party recorded00.0%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–202666,880 (44.9%)0 (0.0%)0 (0.0%)
2023–2024115,389 (77.4%)11,793 (7.9%)28,613 (19.2%)
2021–202295,109 (63.8%)9,299 (6.2%)21,869 (14.7%)
2019–2020106,163 (71.2%)16,946 (11.4%)28,349 (19.0%)
2017–201882,416 (55.3%)10,275 (6.9%)18,851 (12.6%)
2015–201684,870 (57.0%)6,065 (4.1%)14,943 (10.0%)
2013–201465,699 (44.1%)4,841 (3.2%)15,816 (10.6%)
2011–201270,368 (47.2%)3,671 (2.5%)10,659 (7.2%)

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
176,293 (± 2,054)
Median Age
48.5
Median Household Income
$94,757 (± $3,519)
High School Graduate or Higher (age 25+)
95.2%
Bachelor's Degree or Higher (age 25+)
42.8%

Population by Age

GroupPeopleShare
Under 1828,56316.2%
18 to 64106,04460.2%
65 and over41,68623.6%

Population by Race and Hispanic Origin

GroupPeopleShare
Hispanic or Latino (any race)16,9959.6%
White, not Hispanic146,28083.0%
Black, not Hispanic2,4691.4%
Asian, not Hispanic1,4580.8%
American Indian / Alaska Native, not Hispanic7190.4%
Native Hawaiian / Pacific Islander, not Hispanic890.1%
Some other race, not Hispanic1,1620.7%
Two or more races, not Hispanic7,1214.0%

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
174,051
Citizen Voting Age Population (CVAP)
145,525

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic158,22290.9%
Hispanic15,8319.1%
White149,05285.6%
Black2,4071.4%
Asian1,2600.7%
American Indian / Alaska Native7600.4%
Native Hawaiian / Pacific Islander420.0%
Two or More Races4730.3%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic133,75891.9%
Hispanic11,7678.1%
White126,02786.6%
Black2,8492.0%
Asian1,9591.3%
American Indian / Alaska Native2,6001.8%
Native Hawaiian / Pacific Islander370.0%
Two or More Races2890.2%

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