Broomfield, CO Political Map | Democrat & Republican Areas in Broomfield

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

Broomfield leans Democratic by roughly 22 points: about 61% of voters vote Democratic and 39% Republican.

 

About 83% of adults in Broomfield typically vote, above the U.S. average of about 62%. Among adults in Broomfield, ~51% vote Democratic, ~32% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.

How Broomfield compares

Among cities within 25 miles, Broomfield leans more Democratic than 47 of 73 neighbors.

Broomfield runs about 11 points more Democratic than Colorado as a whole.

Politics vary noticeably by neighborhood within Broomfield. The northwest side is the most Democratic-leaning (D+39) and the northeast side is the least Democratic-leaning (D+18), a spread of about 22 points.

Why Broomfield 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 Broomfield, not a ranked or complete list of what matters most.

Dense areas vote Democratic. About 87% of residents in Broomfield live in densely developed areas, about 51 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Broomfield sits in the top quarter (about 57%, above 96% of cities). A high never-married share predicts Democratic voting, and about 31% of adults in Broomfield have never been married, above 76% of cities.

Preventive-care access and voter turnout

Places with strong routine preventive-care access tend to turn out at a higher rate; Broomfield, CO sits in the top quarter 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 Broomfield looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Broomfield 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 70%, about 10 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in Broomfield have completed high school, above 87% of cities. Learn more about the findings and methodology on the political spectrum map.

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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.