Douglas County, CO Political Map | Democrat & Republican Areas in Douglas County

By the BestNeighborhood data science team. Last updated May 2026.

Douglas County leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.

 

About 88% of adults in Douglas County typically vote, above the U.S. average of about 62%. Among adults in Douglas County, ~41% vote Democratic, ~47% Republican, and ~12% don't vote. The map below shows estimated turnout by block group.

How Douglas County compares

Among counties within 50 miles, Douglas County leans more Republican than 8 of 12 neighbors.

Douglas County runs about 18 points more Republican than Colorado as a whole. Colorado leans Democratic overall, while Douglas County is one of the few Republican-leaning pockets.

Politics vary noticeably by city within Douglas County. The north side runs the most Democratic (D+6) and the southeast side runs the most Republican (R+24), a spread of about 30 points.

Why Douglas County leans the way it does

This analysis examined 14,881 data points per county to find what predicts political lean and turnout. The items below are a few correlations that stood out for Douglas County, not a ranked or complete list of what matters most.

Douglas County votes Republican even though it is densely developed (about 71%, far above the Colorado average of 35%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 77% of households in Douglas County are family households, above 97% of counties. Douglas County runs against the grain of Colorado, a Republican-leaning pocket in a Democratic-leaning state.

Preventive-care access and voter turnout

Places with strong routine preventive-care access tend to turn out at a higher rate; Douglas County, CO sits in the top tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.

Why turnout in Douglas County looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Douglas County 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 75%, about 15 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 82% of households in Douglas County own their home, above 86% of counties. High high-school completion lines up with higher turnout, and about 98% of adults in Douglas County have completed high school, in the top fraction of counties. Learn more about the findings and methodology on the political spectrum map.

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.