Centennial leans Democratic by roughly 16 points: about 58% of voters vote Democratic and 42% Republican.
About 87% of adults in Centennial typically vote, above the U.S. average of about 62%. Among adults in Centennial, ~51% vote Democratic, ~37% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.
How Centennial compares
Among cities within 25 miles, Centennial leans more Democratic than 41 of 61 neighbors.
Centennial runs about 5 points more Democratic than Colorado as a whole.
Politics vary noticeably by neighborhood within Centennial. The southwest side runs the most Democratic (D+20) and the southeast side runs the most Republican (R+7), a spread of about 27 points.
Why Centennial 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 Centennial, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 98% of residents in Centennial live in densely developed areas, about 61 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Centennial sits in the top quarter (about 60%, above 97% of cities).
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Centennial, 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 Centennial looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Centennial 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 72%, about 12 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in Centennial have completed high school, above 88% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Greenwood Village, CO D+19
- Englewood, CO D+27
- Meridian, CO D+19
- Lone Tree, CO D+5
- Foxfield, CO R+10
- Cherry Hills Village, CO Even
- Stonegate, CO R+4
- Highlands Ranch, CO D+4
- Aurora, CO D+24
- Parker, CO R+10
Cities with Similar Populations
- Johns Creek, GA D+9
- Rancho Cordova, CA D+10
- Eau Claire, WI D+16
- Westminster, CO D+19
- Somerville, MA D+69
- Springdale, AR R+7
- Owensboro, KY R+26
- Madera, CA Even
- Littleton, CO D+17
- Westland, MI D+15
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.