80621 leans Republican by roughly 22 points: about 39% of voters vote Democratic and 61% Republican.
About 60% of adults in 80621 typically vote, near the U.S. average of about 62%. Among adults in 80621, ~23% vote Democratic, ~37% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.
How 80621 compares
Among zip codes within 15 miles, 80621 leans more Republican than 10 of 15 neighbors.
80621 runs about 34 points more Republican than Colorado as a whole. Colorado leans Democratic overall, while 80621 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 80621. The northeast side is the most Republican-leaning (R+44) and the east side is the least Republican-leaning (R+17), a spread of about 27 points.
Why 80621 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 80621, not a ranked or complete list of what matters most.
80621 votes against the grain of Colorado. Colorado leans Democratic overall, while 80621 runs about 34 points more Republican. A high family-household share predicts Republican voting, and about 79% of households in 80621 are family households, above 90% of zip codes.
High-school completion, uninsured rate, and voter turnout
Places that combine low high-school-completion share and a high uninsured rate tend to turn out at a lower rate, as 80621, CO does.
Why turnout in 80621 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 80621 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
Sources and methodology
Precinct-level voting records used to fit the model come from Colorado Secretary of State, Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.