Colorado Congressional District 04

Congressional District Profile

Overview

District ID
CO-04
State
Colorado
District Number
04
Total Candidates
110
Election Cycles
2026, 2024, 2022, 2020, 2018, 2016, 2014, 2012, 2010, 2008, 2006, 2004, 2002, 2000, 1998, 1996, 1994, 1992, 1990, 1988, 1986, 1984, 1982, 1980

View office details for U.S. Representative - Colorado District 04

Voters

Registered Voters
610,718
Active Voters
553,687 (90.7%)

Party Registration

PartyVotersShare
Democratic94,74615.5%
Republican203,71033.4%
Unaffiliated299,23749.0%
Other parties13,0252.1%
No party recorded00.0%

Turnout by Cycle

CycleGeneralDemocratic PrimaryRepublican Primary
2025–2026246,289 (40.3%)0 (0.0%)0 (0.0%)
2023–2024469,055 (76.8%)42,179 (6.9%)114,164 (18.7%)
2021–2022366,885 (60.1%)29,166 (4.8%)81,622 (13.4%)
2019–2020423,118 (69.3%)59,176 (9.7%)107,352 (17.6%)
2017–2018319,302 (52.3%)32,872 (5.4%)65,460 (10.7%)
2015–2016331,804 (54.3%)17,391 (2.8%)52,020 (8.5%)
2013–2014242,600 (39.7%)15,070 (2.5%)55,158 (9.0%)
2011–2012270,678 (44.3%)11,044 (1.8%)35,910 (5.9%)

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 Citizen Population
729,883
Citizen Voting Age Population (CVAP)
556,346

Citizen Population by Race/Ethnicity

GroupCitizensShare
Non-Hispanic628,92786.2%
Hispanic100,96313.8%
White570,27278.1%
Black13,0581.8%
Asian20,4232.8%
American Indian / Alaska Native1,7500.2%
Native Hawaiian / Pacific Islander7340.1%
Two or More Races3,0300.4%

Citizen Voting Age Population by Race/Ethnicity

GroupCVAPShare
Non-Hispanic490,76188.2%
Hispanic65,58511.8%
White449,75880.8%
Black13,5072.4%
Asian18,9573.4%
American Indian / Alaska Native5,8631.1%
Native Hawaiian / Pacific Islander5590.1%
Two or More Races2,3130.4%

Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation.

Candidates