80631 leans slightly Democratic by roughly 6 points: about 53% of voters vote Democratic and 47% Republican.
About 48% of adults in 80631 typically vote, below the U.S. average of about 62%. Among adults in 80631, ~25% vote Democratic, ~23% Republican, and ~52% don't vote. The map below shows estimated turnout by block group.
How 80631 compares
Among zip codes within 15 miles, 80631 is the most Democratic-leaning.
80631 runs about 6 points more Republican than Colorado as a whole.
Politics vary noticeably by block within 80631. The south side runs the most Democratic (D+15) and the northeast side runs the most Republican (R+50), a spread of about 65 points.
Why 80631 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 80631, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 88% of residents in 80631 live in densely developed areas, about 51 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 42% of adults in 80631 have never been married, above 90% of zip codes.
Population density and Democratic lean
Places with high population density tend to lean Democratic; 80631, CO sits in the top tenth nationally on this measure.
Why turnout in 80631 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 80631 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 49%, about 14 points below the Colorado average of 63%. Renters vote less often than owners, and about 50% of households in 80631 rent, compared to around 17% in nearby zip codes. Low high-school completion lines up with lower turnout, and about 74% of adults in 80631 have completed high school, below 96% of zip codes. 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.