Rockville is a Democratic stronghold. About 75% of voters here vote Democratic and 25% Republican.
About 68% of adults in Rockville typically vote, above the U.S. average of about 62%. Among adults in Rockville, ~51% vote Democratic, ~17% Republican, and ~32% don't vote. The map below shows estimated turnout by block group.
How Rockville compares
Among cities within 25 miles, Rockville leans more Democratic than 120 of 201 neighbors.
Rockville runs about 21 points more Democratic than Maryland as a whole.
Politics vary noticeably by neighborhood within Rockville. The northwest side is the most Democratic-leaning (D+58) and the northeast side is the least Democratic-leaning (D+30), a spread of about 28 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.
Areas with high college attainment vote Democratic. About 65% of adults in Rockville hold a bachelor's degree, about 37 points above the U.S. average of 28%. Dense areas vote Democratic, and Rockville sits in the top fifth on density (about 93%, above 97% of cities). A high never-married share predicts Democratic voting, and about 32% of adults in Rockville have never been married, above 80% of cities.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Rockville, MD 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 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 70%, about 10 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Redland, MD D+47
- Derwood, MD D+38
- Washington Grove, MD D+55
- North Bethesda, MD D+58
- Potomac, MD D+49
- Aspen Hill, MD D+48
- North Potomac, MD D+46
- Gaithersburg, MD D+43
- Travilah, MD D+36
- Garrett Park, MD D+68
Cities with Similar Populations
- Salisbury, NC R+14
- Bossier City, LA R+16
- Fort Pierce, FL D+4
- Highland, CA D+6
- Bolingbrook, IL D+29
- Wake Forest, NC D+9
- Mount Vernon, NY D+69
- Redlands, CA D+3
- Lodi, CA R+8
- Rocklin, CA R+9
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from Maryland State Board 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.