80831 leans heavily Republican by roughly 40 points: about 30% of voters vote Democratic and 70% Republican.
About 88% of adults in 80831 typically vote, above the U.S. average of about 62%. Among adults in 80831, ~26% vote Democratic, ~62% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.
How 80831 compares
Among zip codes within 15 miles, 80831 leans more Republican than 20 of 22 neighbors.
80831 runs about 52 points more Republican than Colorado as a whole. Colorado leans Democratic overall, while 80831 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 80831. The southeast side is the most Republican-leaning (R+54) and the northwest side is the least Republican-leaning (R+35), a spread of about 19 points.
Why 80831 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 80831, not a ranked or complete list of what matters most.
80831 votes against the grain of Colorado. Colorado leans Democratic overall, while 80831 runs about 52 points more Republican. A high family-household share predicts Republican voting, and about 86% of households in 80831 are family households, above 98% of zip codes.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; 80831, CO sits in the top tenth nationally on this measure.
Why turnout in 80831 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 80831 is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 69%, about 9 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 92% of households in 80831 own their home, about 17 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 98% of adults in 80831 have completed high school, above 92% 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.