Perris, CA Political Map | Democrat & Republican Areas in Perris

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

Perris leans slightly Democratic by roughly 14 points: about 57% of voters vote Democratic and 43% Republican.

 

About 37% of adults in Perris typically vote, below the U.S. average of about 62%. Among adults in Perris, ~21% vote Democratic, ~16% Republican, and ~63% don't vote. The map below shows estimated turnout by block group.

How Perris compares

Among cities within 25 miles, Perris leans more Democratic than 54 of 59 neighbors.

Perris runs about 6 points more Republican than California as a whole.

Politics vary noticeably by neighborhood within Perris. The southeast side runs the most Democratic (D+27) and the northwest side runs the most Republican (R+9), a spread of about 36 points.

Why Perris leans the way it does

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

Dense areas vote Democratic. About 79% of residents in Perris live in densely developed areas, about 43 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 41% of adults in Perris have never been married, above 94% of cities.

Paved land cover and Democratic lean

Places with extensive paved surfaces tend to lean Democratic; Perris, 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 Perris looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Perris is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 30% of households in Perris rent, above 84% of cities. High food insecurity lines up with lower turnout, and about 30% of adults in Perris report food insecurity, above 95% of cities. 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.