Placentia is a true toss-up. About 52% of voters here vote Democratic and 48% Republican.
About 60% of adults in Placentia typically vote, near the U.S. average of about 62%. Among adults in Placentia, ~31% vote Democratic, ~29% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.
How Placentia compares
Among cities within 25 miles, Placentia leans more Democratic than 38 of 128 neighbors.
Placentia runs about 17 points more Republican than California as a whole.
Politics vary noticeably by neighborhood within Placentia. The southwest side runs the most Democratic (D+24) and the east side runs the most Republican (R+11), a spread of about 35 points.
Why Placentia leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Placentia. The lean here lands roughly where demographic data alone would predict.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Placentia, CA sits in the top tenth nationally on this measure.
Why turnout in Placentia looks the way it does
Renters vote less often than owners. About 40% of households in Placentia rent, about 15 points above the U.S. average of 25%. Crowded housing lines up with lower turnout, and about 8% of homes in Placentia have more than one occupant per room, above 94% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Brea, CA R+2
- Fullerton, CA D+11
- Yorba Linda, CA R+15
- Anaheim, CA D+11
- Villa Park, CA R+22
- Orange, CA D+6
- La Habra, CA D+5
- Orange Park Acres, CA R+28
- Rowland Heights, CA D+10
- La Habra Heights, CA R+10
Cities with Similar Populations
- Perth Amboy, NJ D+11
- Carson City, NV R+11
- Colton, CA D+17
- Carrollton, GA R+23
- Royal Oak, MI D+32
- La Jolla, CA D+39
- Westminster, MD R+23
- Oak Lawn, IL D+2
- Medford, MA D+46
- Marana, AZ R+9
All Local Stats
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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.