Superior is a Democratic stronghold. About 75% of voters here vote Democratic and 25% Republican.
About 86% of adults in Superior typically vote, above the U.S. average of about 62%. Among adults in Superior, ~65% vote Democratic, ~21% Republican, and ~14% don't vote. The map below shows estimated turnout by block group.
How Superior compares
Among cities within 25 miles, Superior leans more Democratic than 65 of 75 neighbors.
Superior runs about 40 points more Democratic than Colorado as a whole.
Politics vary noticeably by neighborhood within Superior. The south side is the most Democratic-leaning (D+56) and the west side is the least Democratic-leaning (D+33), a spread of about 23 points.
Why Superior 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 Superior, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 79% of adults in Superior hold a bachelor's degree, about 51 points above the U.S. average of 28%. Dense areas vote Democratic, and Superior sits in the top fifth on density (about 79%, above 94% of cities).
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Superior, CO sits in the top tenth 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 Superior looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Superior 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 77%, about 17 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and more than 99% of adults in Superior have completed high school, in the top fraction of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Louisville, CO D+59
- Broomfield, CO D+22
- Lafayette, CO D+49
- Eldorado Springs, CO D+53
- Westminster, CO D+19
- Arvada, CO D+15
- Boulder, CO D+69
- Federal Heights, CO D+18
- Erie, CO D+21
- Gunbarrel, CO D+55
Cities with Similar Populations
- Foristell, MO R+41
- Mulberry, FL R+33
- Grantsville, UT R+58
- Lakeland, TN R+30
- West Carrollton, OH R+16
- Lake Station, IN R+12
- Coalinga, CA R+14
- Ipswich, MA D+26
- Cutlerville, MI D+9
- South Farmingdale, NY R+26
All Local Stats
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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.