81121 leans heavily Republican by roughly 30 points: about 35% of voters vote Democratic and 65% Republican.
About 76% of adults in 81121 typically vote, above the U.S. average of about 62%. Among adults in 81121, ~27% vote Democratic, ~49% Republican, and ~24% don't vote. The map below shows estimated turnout by block group.
How 81121 compares
81121 sits in a sparsely populated area with few comparable zip codes nearby.
81121 runs about 42 points more Republican than Colorado as a whole. Colorado leans Democratic overall, while 81121 is one of the few Republican-leaning pockets.
Why 81121 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 81121, not a ranked or complete list of what matters most.
81121 votes against the grain of Colorado. Colorado leans Democratic overall, while 81121 runs about 42 points more Republican. Rural areas vote Republican, and 81121 sits in the bottom quarter on density (about 1%, below 97% of zip codes).
Population density and Republican lean
Places with low population density tend to lean Republican; 81121, CO sits in the bottom tenth nationally on this measure.
Why turnout in 81121 looks the way it does
Homeowners vote more often than renters. About 92% of households in 81121 own their home, about 17 points above the Colorado average of 75%. 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.