Columbia San Diego, San Diego, CA Political Map | Democrat & Republican Areas in Columbia San Diego

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

Columbia San Diego leans heavily Democratic by roughly 38 points: about 69% of voters vote Democratic and 31% Republican.

 

About 53% of adults in Columbia San Diego typically vote, below the U.S. average of about 62%. Among adults in Columbia San Diego, ~37% vote Democratic, ~16% Republican, and ~47% don't vote. The map below shows estimated turnout by block group.

How Columbia San Diego compares

Among neighborhoods within 5 miles, Columbia San Diego leans more Democratic than 9 of 33 neighbors.

Columbia San Diego runs about 17 points more Democratic than California as a whole.

Why Columbia San Diego leans the way it does

This analysis examined 14,881 data points per neighborhood to find what predicts political lean and turnout. The items below are a few correlations that stood out for Columbia San Diego, not a ranked or complete list of what matters most.

Dense areas vote Democratic. More than 99% of residents in Columbia San Diego live in densely developed areas, about 64 points above the U.S. average of 36%.

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; Columbia San Diego, San Diego, 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 Columbia San Diego looks the way it does

Turnout in Columbia San Diego 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.

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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.