El Rio leans heavily Democratic by roughly 34 points: about 67% of voters vote Democratic and 33% Republican.
About 48% of adults in El Rio typically vote, below the U.S. average of about 62%. Among adults in El Rio, ~32% vote Democratic, ~16% Republican, and ~52% don't vote. The map below shows estimated turnout by block group.
How El Rio compares
Among neighborhoods within 5 miles, El Rio leans more Democratic than 10 of 18 neighbors.
El Rio runs about 14 points more Democratic than California as a whole.
Politics vary noticeably by block within El Rio. The southwest side is the most Democratic-leaning (D+39) and the north side is the least Democratic-leaning (D+27), a spread of about 12 points.
Why El Rio leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in El Rio. The lean here lands roughly where demographic data alone would predict.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; El Rio, Oxnard, CA sits in the bottom tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in El Rio looks the way it does
Areas with limited routine healthcare access turn out at lower rates. El Rio 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 50%, about 12 points below the California average of 62%. High food insecurity lines up with lower turnout, and about 34% of adults in El Rio report food insecurity, above 87% of neighborhoods. Low high-school completion lines up with lower turnout, and about 58% of adults in El Rio have completed high school, in the bottom fraction of neighborhoods. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Rio Lindo, Oxnard, CA D+31
- Town Center, Oxnard, CA D+33
- South Bank, Oxnard, CA D+30
- Orchard, Oxnard, CA D+31
- East Village Oxnard, Oxnard, CA D+24
- West Village, Oxnard, CA D+29
- Sierra Linda, Oxnard, CA D+31
- Carriage Square, Oxnard, CA D+35
- La Colonia, Oxnard, CA D+39
- Wilson, Oxnard, CA D+39
Neighborhoods with Similar Populations
- Magnolia Place, Fresno, TX D+44
- Veterans Park, Boise, ID D+29
- Roosevelt Park, Grand Rapids, MI D+39
- University of Ohio Akron, Akron, OH D+49
- Butts Station, Chesapeake, VA R+34
- Brighton, Syracuse, NY D+78
- Downtown Norfolk, Norfolk, VA D+61
- West End Theatre District, Allentown, PA D+26
- North Dakota State University, Fargo, ND D+7
- North Orange, Orlando, FL D+15
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.