Ventura County leans Democratic by roughly 16 points: about 58% of voters vote Democratic and 42% Republican.
About 62% of adults in Ventura County typically vote, near the U.S. average of about 62%. Among adults in Ventura County, ~36% vote Democratic, ~26% Republican, and ~38% don't vote. The map below shows estimated turnout by block group.
How Ventura County compares
Politically, Ventura County sits close to the rest of California.
Politics vary noticeably by city within Ventura County. The southwest side is the most Democratic-leaning (D+29) and the east side is the least Democratic-leaning (D+2), a spread of about 27 points.
Why Ventura 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 Ventura County, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 82% of residents in Ventura County live in densely developed areas, about 45 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Ventura County sits in the top quarter (about 36%, above 87% of counties). A high never-married share predicts Democratic voting, and about 35% of adults in Ventura County have never been married, above 83% of counties.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Ventura County, CA 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 Ventura County looks the way it does
Turnout in Ventura County sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Counties
- Los Angeles County, CA D+32
- Santa Barbara County, CA D+26
- Orange County, CA D+6
- Kern County, CA R+12
- San Bernardino County, CA Even
- Riverside County, CA Even
- San Luis Obispo County, CA D+8
- Tulare County, CA R+12
- Kings County, CA R+10
- San Diego County, CA D+17
Counties with Similar Populations
- Baltimore County, MD D+28
- Montgomery County, PA D+21
- Hamilton County, OH D+21
- Snohomish County, WA D+10
- Worcester County, MA D+12
- Middlesex County, NJ D+11
- Essex County, NJ D+48
- Fort Bend County, TX D+6
- El Paso County, TX D+15
- Hidalgo County, TX R+2
Sources and methodology
Precinct-level voting records used to fit the model come from California 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.