Eastside Santa Ana, Santa Ana, CA Political Map | Democrat & Republican Areas in Eastside Santa Ana

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

Eastside Santa Ana leans heavily Democratic by roughly 34 points: about 67% of voters vote Democratic and 33% Republican.

 

About 32% of adults in Eastside Santa Ana typically vote, below the U.S. average of about 62%. Among adults in Eastside Santa Ana, ~21% vote Democratic, ~11% Republican, and ~68% don't vote. The map below shows estimated turnout by block group.

How Eastside Santa Ana compares

Among neighborhoods within 5 miles, Eastside Santa Ana leans more Democratic than 33 of 36 neighbors.

Eastside Santa Ana runs about 13 points more Democratic than California as a whole.

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

Why Eastside Santa Ana 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 Eastside Santa Ana, not a ranked or complete list of what matters most.

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

Paved land cover and Democratic lean

Places with extensive paved surfaces tend to lean Democratic; Eastside Santa Ana, Santa Ana, CA sits in the top tenth 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 Eastside Santa Ana looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Eastside Santa Ana is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 45%, about 17 points below the California average of 62%. High food insecurity lines up with lower turnout, and about 38% of adults in Eastside Santa Ana report food insecurity, above 92% of neighborhoods. Low high-school completion lines up with lower turnout, and about 58% of adults in Eastside Santa Ana have completed high school, in the bottom fraction of neighborhoods. 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.