Arlington Heights leans slightly Republican by roughly 8 points: about 46% of voters vote Democratic and 54% Republican.
About 49% of adults in Arlington Heights typically vote, below the U.S. average of about 62%. Among adults in Arlington Heights, ~23% vote Democratic, ~26% Republican, and ~51% don't vote. The map below shows estimated turnout by block group.
How Arlington Heights compares
Among neighborhoods within 5 miles, Arlington Heights leans more Republican than 15 of 16 neighbors.
Arlington Heights runs about 28 points more Republican than California as a whole. California leans Democratic overall, while Arlington Heights is one of the few Republican-leaning pockets.
Politics vary noticeably by block within Arlington Heights. The north side runs the most Democratic (D+8) and the south side runs the most Republican (R+27), a spread of about 35 points.
Why Arlington Heights 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 Heights, not a ranked or complete list of what matters most.
Areas with many family households vote Republican. About 82% of households in Arlington Heights are family households, about 15 points above the U.S. average of 67%. Arlington Heights runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.
Developed land and Republican lean
Places with a rural land-use pattern tend to lean Republican; Arlington Heights, Riverside, CA sits below the national average on this measure. Developed land does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Arlington Heights looks the way it does
Crowded housing lines up with lower turnout. About 9% of homes in Arlington Heights have more than one occupant per room, above 90% of neighborhoods. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Presidential Park, Riverside, CA D+5
- Casablanca, Riverside, CA D+17
- Arlington South, Riverside, CA R+2
- Ramona, Riverside, CA D+7
- Alessandro Heights, Riverside, CA R+18
- Arlington, Riverside, CA D+11
- Magnolia Center, Riverside, CA D+8
- Victoria, Riverside, CA D+3
- Airport, Riverside, CA D+9
- Grand, Riverside, CA D+4
Neighborhoods with Similar Populations
- Schenk-Atwood-Starkweather-Yahar, Madison, WI D+85
- South Marketview Heights, Rochester, NY D+70
- Carriage Square, Oxnard, CA D+35
- Newland, Huntington Beach, CA R+3
- Sharon Woods, Charlotte, NC D+12
- Northrup, Minneapolis, MN D+77
- Central West Denver, Denver, CO D+51
- Palisades, Lake Oswego, OR D+39
- Carlton Hill, Wallington, NJ R+16
- Summerside, Cincinnati, OH R+32
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.