81120 leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.
About 66% of adults in 81120 typically vote, near the U.S. average of about 62%. Among adults in 81120, ~29% vote Democratic, ~37% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How 81120 compares
Among zip codes within 15 miles, 81120 leans more Republican than 1 of 5 neighbors.
81120 runs about 23 points more Republican than Colorado as a whole. Colorado leans Democratic overall, while 81120 is one of the few Republican-leaning pockets.
Politics vary noticeably by block within 81120. The northeast side is the most Republican-leaning (R+25) and the northwest side is the least Republican-leaning (R+8), a spread of about 17 points.
Why 81120 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 81120, not a ranked or complete list of what matters most.
81120 votes against the grain of Colorado. Colorado leans Democratic overall, while 81120 runs about 23 points more Republican.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 81120, CO sits in the bottom tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 81120 looks the way it does
Areas with limited routine healthcare access turn out at lower rates. 81120 is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The uninsured rate here is about 20%, about 9 points above the Colorado average of 11%. 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.