81623 leans Democratic by roughly 30 points: about 65% of voters vote Democratic and 35% Republican.
About 85% of adults in 81623 typically vote, above the U.S. average of about 62%. Among adults in 81623, ~55% vote Democratic, ~30% Republican, and ~15% don't vote. The map below shows estimated turnout by block group.
How 81623 compares
Among zip codes within 15 miles, 81623 is the most Democratic-leaning.
81623 runs about 19 points more Democratic than Colorado as a whole.
Politics vary noticeably by block within 81623. The west side is the most Democratic-leaning (D+42) and the northeast side is the least Democratic-leaning (D+17), a spread of about 24 points.
Why 81623 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 81623, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 51% of adults in 81623 hold a bachelor's degree, about 23 points above the U.S. average of 28%.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; 81623, CO sits above the national average on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in 81623 looks the way it does
Turnout in 81623 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.