81657 leans heavily Democratic by roughly 32 points: about 66% of voters vote Democratic and 34% Republican.
About 87% of adults in 81657 typically vote, above the U.S. average of about 62%. Among adults in 81657, ~58% vote Democratic, ~30% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.
How 81657 compares
Among zip codes within 15 miles, 81657 leans more Democratic than 2 of 4 neighbors.
81657 runs about 21 points more Democratic than Colorado as a whole.
Why 81657 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 81657, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 69% of adults in 81657 hold a bachelor's degree, about 41 points above the U.S. average of 28%. A high never-married share predicts Democratic voting, and about 38% of adults in 81657 have never been married, above 84% of zip codes.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; 81657, CO sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 81657 looks the way it does
Areas with strong routine healthcare access turn out at higher rates. 81657 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 73%, about 13 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 99% of adults in 81657 have completed high school, above 98% 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.