Los Angeles County, CA Political Map | Democrat & Republican Areas in Los Angeles County

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

Los Angeles County leans heavily Democratic by roughly 32 points: about 66% of voters vote Democratic and 34% Republican.

 

About 51% of adults in Los Angeles County typically vote, below the U.S. average of about 62%. Among adults in Los Angeles County, ~34% vote Democratic, ~17% Republican, and ~49% don't vote. The map below shows estimated turnout by block group.

How Los Angeles County compares

Los Angeles County sits in a sparsely populated area with few comparable counties nearby.

Los Angeles County runs about 12 points more Democratic than California as a whole.

Politics vary noticeably by city within Los Angeles County. The west side is the most Democratic-leaning (D+50) and the north side is the least Democratic-leaning (D+14), a spread of about 36 points.

Why Los Angeles 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 Los Angeles County, not a ranked or complete list of what matters most.

Dense areas vote Democratic. About 96% of residents in Los Angeles County live in densely developed areas, about 60 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Los Angeles County sits in the top quarter (about 35%, above 86% of counties). A high never-married share predicts Democratic voting, and about 43% of adults in Los Angeles County have never been married, above 95% of counties.

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; Los Angeles 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 Los Angeles County looks the way it does

Renters vote less often than owners. About 52% of households in Los Angeles County rent, about 27 points above the U.S. average of 25%. Limited routine healthcare access lines up with lower turnout, and Los Angeles County sits in the bottom quarter on routine-care measures. High food insecurity lines up with lower turnout, and about 23% of adults in Los Angeles County report food insecurity, above 85% of counties. 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 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.