Arlington South is a true toss-up. About 49% of voters here vote Democratic and 51% Republican.
About 56% of adults in Arlington South typically vote, below the U.S. average of about 62%. Among adults in Arlington South, ~27% vote Democratic, ~29% Republican, and ~44% don't vote. The map below shows estimated turnout by block group.
How Arlington South compares
Among neighborhoods within 5 miles, Arlington South sits roughly in the middle of the political spectrum, with 14 neighbors leaning further in the place's direction and 2 leaning the other way.
Arlington South runs about 22 points more Republican than California as a whole. California leans Democratic overall, while Arlington South sits closer to the political middle.
Politics vary noticeably by block within Arlington South. The north side runs the most Democratic (D+8) and the southwest side runs the most Republican (R+16), a spread of about 24 points.
Why Arlington South 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 Arlington South, not a ranked or complete list of what matters most.
Arlington South votes against the grain of California. California leans Democratic overall, while Arlington South runs about 22 points more Republican.
Housing overcrowding and voter turnout
Places with heavy housing overcrowding tend to turn out at a lower rate; Arlington South, Riverside, CA sits in the top quarter nationally on this measure.
Why turnout in Arlington South looks the way it does
Turnout in Arlington South sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Arlington, Riverside, CA D+11
- Presidential Park, Riverside, CA D+5
- Arlington Heights, Riverside, CA R+8
- Ramona, Riverside, CA D+7
- La Sierra South, Riverside, CA Even
- La Sierra, Riverside, CA D+9
- Arlanza, Riverside, CA D+15
- Casablanca, Riverside, CA D+17
- Airport, Riverside, CA D+9
- La Sierra Acres, Riverside, CA D+8
Neighborhoods with Similar Populations
- Staumbaugh Heller, Redwood City, CA D+51
- Lansdowne, Charlotte, NC D+29
- The Islands, Gilbert, AZ R+5
- Martindale-Brightwood, Indianapolis, IN D+66
- Irvine Business Complex, Irvine, CA D+11
- University Park-San Antonio, San Antonio, TX D+30
- Biltmore Shores, Massapequa, NY R+44
- Downtown La Porte, La Porte, TX R+25
- Cotswold, Charlotte, NC D+25
- Riverchase Country Club, Hoover, AL R+31
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.