Pico Rivera leans Democratic by roughly 28 points: about 64% of voters vote Democratic and 36% Republican.
About 50% of adults in Pico Rivera typically vote, below the U.S. average of about 62%. Among adults in Pico Rivera, ~32% vote Democratic, ~18% Republican, and ~50% don't vote. The map below shows estimated turnout by block group.
How Pico Rivera compares
Among cities within 25 miles, Pico Rivera leans more Democratic than 94 of 146 neighbors.
Pico Rivera runs about 8 points more Democratic than California as a whole.
Politics vary noticeably by neighborhood within Pico Rivera. The northwest side is the most Democratic-leaning (D+36) and the south side is the least Democratic-leaning (D+23), a spread of about 14 points.
Why Pico Rivera 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 Pico Rivera, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in Pico Rivera live in densely developed areas, about 63 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 42% of adults in Pico Rivera have never been married, above 95% of cities.
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Pico Rivera, 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 Pico Rivera looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Pico Rivera is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. High food insecurity lines up with lower turnout, and about 26% of adults in Pico Rivera report food insecurity, above 92% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- West Whittier-Los Nietos, CA D+28
- Montebello, CA D+28
- Santa Fe Springs, CA D+25
- Commerce, CA D+33
- Bell Gardens, CA D+36
- Whittier, CA D+18
- Downey, CA D+23
- South Whittier, CA D+20
- Monterey Park, CA D+21
- South El Monte, CA D+28
Cities with Similar Populations
- Montebello, CA D+28
- Wilmington, CA D+30
- Wellington, FL R+6
- Cartersville, GA R+34
- La Mesa, CA D+24
- Tigard, OR D+40
- Kannapolis, NC R+8
- Kapolei, HI D+7
- Smyrna, TN R+16
- Blue Springs, MO R+7
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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.