Union is a Republican stronghold. About 16% of voters here vote Democratic and 84% Republican.
About 83% of adults in Union typically vote, above the U.S. average of about 62%. Among adults in Union, ~13% vote Democratic, ~70% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.
How Union compares
Among cities within 25 miles, Union leans more Republican than 9 of 15 neighbors.
Union runs about 79 points more Republican than Colorado as a whole. Colorado leans Democratic overall, while Union is one of the few Republican-leaning pockets.
Why Union leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Union, not a ranked or complete list of what matters most.
Union votes against the grain of Colorado. Colorado leans Democratic overall, while Union runs about 79 points more Republican. Rural areas vote Republican, and Union sits in the bottom quarter on density (about 3%, below 89% of cities). A high family-household share predicts Republican voting, and about 77% of households in Union are family households, above 83% of cities.
Population density and Republican lean
Places with low population density tend to lean Republican; Union, CO sits in the bottom tenth nationally on this measure.
Why turnout in Union looks the way it does
Turnout in Union 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 Cities
- Hillrose, CO R+64
- Messex, CO R+72
- Snyder, CO R+67
- Merino, CO R+76
- Brush, CO R+36
- Willard, CO R+76
- Atwood, CO R+66
- Stoneham, CO R+74
- Ninemile Corner, CO R+66
- Fort Morgan, CO R+23
Cities with Similar Populations
- Flippin, KY R+77
- Auvinen Corner, MI R+11
- Dupont, FL R+43
- Mount Lemmon, AZ R+8
- Lajitas, TX R+30
- Haley, ND R+73
- Hobart, KY R+72
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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.