81131 leans heavily Democratic by roughly 36 points: about 68% of voters vote Democratic and 32% Republican.
About more than 99% of adults in 81131 typically vote, above the U.S. average of about 62%. Among adults in 81131, ~77% vote Democratic, ~37% Republican, and ~-14% don't vote. The map below shows estimated turnout by block group.
How 81131 compares
81131 runs about 25 points more Democratic than Colorado as a whole.
Why 81131 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 81131, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 48% of adults in 81131 hold a bachelor's degree, about 19 points above the U.S. average of 28%.
High-school completion, developed land, and voter turnout
Places that combine high-school-completion-heavy adults and a rural land-use pattern tend to turn out at a higher rate, as 81131, CO does.
Why turnout in 81131 looks the way it does
Turnout in 81131 sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. 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.