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

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

Serra Mesa leans heavily Democratic by roughly 30 points: about 65% of voters vote Democratic and 35% Republican.

 

About 60% of adults in Serra Mesa typically vote, near the U.S. average of about 62%. Among adults in Serra Mesa, ~39% vote Democratic, ~21% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.

How Serra Mesa compares

Among neighborhoods within 5 miles, Serra Mesa leans more Democratic than 8 of 27 neighbors.

Serra Mesa runs about 10 points more Democratic than California as a whole.

Politics vary noticeably by block within Serra Mesa. The southwest side is the most Democratic-leaning (D+40) and the west side is the least Democratic-leaning (D+19), a spread of about 21 points.

Why Serra Mesa leans the way it does

Density, race composition, education, and family structure all sit close to their national averages in Serra Mesa. The lean here lands roughly where demographic data alone would predict.

Paved land cover and Democratic lean

Places with extensive paved surfaces tend to lean Democratic; Serra Mesa, San Diego, CA sits in the top quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.

Why turnout in Serra Mesa looks the way it does

Turnout in Serra Mesa 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.

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.