Antioch leans heavily Democratic by roughly 34 points: about 67% of voters vote Democratic and 33% Republican.
About 52% of adults in Antioch typically vote, below the U.S. average of about 62%. Among adults in Antioch, ~35% vote Democratic, ~17% Republican, and ~48% don't vote. The map below shows estimated turnout by block group.
How Antioch compares
Among cities within 25 miles, Antioch leans more Democratic than 34 of 50 neighbors.
Antioch runs about 14 points more Democratic than California as a whole.
Politics vary noticeably by neighborhood within Antioch. The northwest side is the most Democratic-leaning (D+45) and the southwest side is the least Democratic-leaning (D+18), a spread of about 27 points.
Why Antioch 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 Antioch, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 89% of residents in Antioch live in densely developed areas, about 53 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 37% of adults in Antioch have never been married, above 91% of cities.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Antioch, CA sits in the top tenth nationally on this measure.
Why turnout in Antioch looks the way it does
Renters vote less often than owners. About 36% of households in Antioch rent, about 11 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 21% of adults in Antioch report food insecurity, above 83% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Oakley, CA D+2
- Brentwood, CA D+7
- Bridgehead, CA R+8
- Pittsburg, CA D+38
- Clayton, CA D+14
- Knightsen, CA R+21
- Bay Point, CA D+37
- Bethel Island, CA R+15
- Birds Landing, CA R+33
- Discovery Bay, CA R+12
Cities with Similar Populations
- Downey, CA D+23
- Charlottesville, VA D+45
- Longmont, CO D+32
- High Point, NC D+22
- Peoria, IL D+31
- Santa Maria, CA D+10
- Bowling Green, KY R+11
- Sparks, NV Even
- Norcross, GA D+31
- Greeley, CO R+5
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.