Tierrasanta leans Democratic by roughly 20 points: about 60% of voters vote Democratic and 40% Republican.
About 70% of adults in Tierrasanta typically vote, above the U.S. average of about 62%. Among adults in Tierrasanta, ~42% vote Democratic, ~28% Republican, and ~30% don't vote. The map below shows estimated turnout by block group.
How Tierrasanta compares
Among neighborhoods within 5 miles, Tierrasanta leans more Democratic than 2 of 16 neighbors.
Politically, Tierrasanta sits close to the rest of California.
Politics vary noticeably by block within Tierrasanta. The west side is the most Democratic-leaning (D+32) and the southwest side is the least Democratic-leaning (Even), a spread of about 31 points.
Why Tierrasanta leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Tierrasanta. The lean here lands roughly where demographic data alone would predict.
Population density, never-married share, and Democratic lean
Places that combine high population density and a low never-married share tend to lean Democratic, as Tierrasanta, San Diego, CA does.
Why turnout in Tierrasanta looks the way it does
Turnout in Tierrasanta 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 Neighborhoods
- Allied Gardens, San Diego, CA D+25
- Grantville, San Diego, CA D+36
- Kearny Mesa, San Diego, CA D+25
- San Carlos, San Diego, CA D+25
- Del Cerro, San Diego, CA D+27
- Serra Mesa, San Diego, CA D+30
- Kensington, San Diego, CA D+57
- College Area, San Diego, CA D+41
- Bird Land, San Diego, CA D+32
- Lake Murray, San Diego, CA D+20
Neighborhoods with Similar Populations
- Outer Richmond, San Francisco, CA D+57
- Bear Creek, Stockton, CA D+15
- Villages of Palm Beach Lakes, West Palm Beach, FL D+31
- Golden Glades-The Woods, Jacksonville, FL R+17
- Lower Peters Canyon, Irvine, CA D+13
- Northwest Dallas, Dallas, TX D+11
- Liliha-Kapalama, Honolulu, HI D+23
- Charles Village, Baltimore, MD D+79
- Ocean View, San Francisco, CA D+45
- South Phoenix, Phoenix, AZ D+30
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.