Napa leans heavily Democratic by roughly 32 points: about 66% of voters vote Democratic and 34% Republican.
About 64% of adults in Napa typically vote, near the U.S. average of about 62%. Among adults in Napa, ~42% vote Democratic, ~22% Republican, and ~36% don't vote. The map below shows estimated turnout by block group.
How Napa compares
Among cities within 25 miles, Napa leans more Democratic than 19 of 43 neighbors.
Napa runs about 12 points more Democratic than California as a whole.
Politics vary noticeably by neighborhood within Napa. The east side is the most Democratic-leaning (D+39) and the northeast side is the least Democratic-leaning (D+16), a spread of about 22 points.
Why Napa 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 Napa, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 82% of residents in Napa live in densely developed areas, about 45 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Napa sits in the top quarter (about 39%, above 86% of cities). A high never-married share predicts Democratic voting, and about 32% of adults in Napa have never been married, above 79% of cities.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Napa, CA sits in the top tenth nationally on this measure.
Why turnout in Napa looks the way it does
Turnout in Napa 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 Cities
- Salvador, CA D+26
- Yountville, CA D+32
- Oakville, CA D+31
- Sonoma, CA D+48
- Schellville, CA D+33
- American Canyon, CA D+29
- Eldridge, CA D+44
- Glen Ellen, CA D+54
- El Verano, CA D+43
- Fairfield, CA D+22
Cities with Similar Populations
- Champaign, IL D+45
- Bismarck, ND R+30
- Walnut Creek, CA D+47
- Utica, MI R+22
- Tustin, CA D+14
- Covington, GA D+22
- Manteca, CA R+8
- Elkhart, IN R+15
- Fort Smith, AR R+16
- Macomb, MI R+28
All Local Stats
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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.