Rockville, VA Political Map | Democrat & Republican Areas in Rockville

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

Rockville leans Republican by roughly 28 points: about 36% of voters vote Democratic and 64% Republican.

 

About 91% of adults in Rockville typically vote, above the U.S. average of about 62%. Among adults in Rockville, ~33% vote Democratic, ~59% Republican, and ~8% don't vote. The map below shows estimated turnout by block group.

How Rockville compares

Among cities within 25 miles, Rockville leans more Republican than 54 of 89 neighbors.

Rockville runs about 33 points more Republican than Virginia as a whole. Virginia leans Democratic overall, while Rockville is one of the few Republican-leaning pockets.

Politics vary noticeably by neighborhood within Rockville. The northwest side is the most Republican-leaning (R+32) and the southeast side is the least Republican-leaning (R+19), a spread of about 14 points.

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

Rockville votes against the grain of Virginia. Virginia leans Democratic overall, while Rockville runs about 33 points more Republican. A high family-household share predicts Republican voting, and about 76% of households in Rockville are family households, above 77% of cities.

Preventive-care access and voter turnout

Places with strong routine preventive-care access tend to turn out at a higher rate; Rockville, VA 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 Rockville looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Rockville 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 92% of households in Rockville own their home, about 17 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 96% of adults in Rockville have completed high school, above 85% of cities. 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 Virginia Department of 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.