81151 leans Republican by roughly 24 points: about 38% of voters vote Democratic and 62% Republican.
About 97% of adults in 81151 typically vote, above the U.S. average of about 62%. Among adults in 81151, ~37% vote Democratic, ~60% Republican, and ~3% don't vote. The map below shows estimated turnout by block group.
How 81151 compares
Among zip codes within 15 miles, 81151 leans more Republican than 3 of 6 neighbors.
81151 runs about 35 points more Republican than Colorado as a whole. Colorado leans Democratic overall, while 81151 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 81151. The east side runs the most Democratic (D+33) and the north side runs the most Republican (R+35), a spread of about 68 points.
Why 81151 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 81151, not a ranked or complete list of what matters most.
81151 votes against the grain of Colorado. Colorado leans Democratic overall, while 81151 runs about 35 points more Republican.
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; 81151, CO sits below the national average on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in 81151 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 81151 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. 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.