Edison leans heavily Democratic by roughly 38 points: about 69% of voters vote Democratic and 31% Republican.
About 32% of adults in Edison typically vote, below the U.S. average of about 62%. Among adults in Edison, ~22% vote Democratic, ~10% Republican, and ~68% don't vote. The map below shows estimated turnout by block group.
How Edison compares
Among neighborhoods within 5 miles, Edison is the most Democratic-leaning.
Edison runs about 17 points more Democratic than California as a whole.
Politics vary noticeably by block within Edison. The north side is the most Democratic-leaning (D+43) and the northwest side is the least Democratic-leaning (D+25), a spread of about 18 points.
Why Edison 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 Edison, not a ranked or complete list of what matters most.
Areas with many never-married adults vote Democratic. About 51% of adults in Edison have never been married, modestly above similar-sized neighborhoods (around 46%).
High-school completion, uninsured rate, and voter turnout
Places that combine low high-school-completion share and a high uninsured rate tend to turn out at a lower rate, as Edison, Fresno, CA does.
Why turnout in Edison looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Edison 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 37%, about 25 points below the California average of 62%. High food insecurity lines up with lower turnout, and about 50% of adults in Edison report food insecurity, in the top fraction of neighborhoods. Low high-school completion lines up with lower turnout, and about 61% of adults in Edison have completed high school, below 98% of neighborhoods. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Central, Fresno, CA D+30
- Fresno-High, Fresno, CA D+23
- Roosevelt, Fresno, CA D+18
- McLane, Fresno, CA D+10
- West, Fresno, CA D+5
- Hoover, Fresno, CA D+12
- Bullard, Fresno, CA D+4
- Southeast Growth Area, Fresno, CA R+34
- Woodward Park, Fresno, CA R+7
- North Growth Area, Fresno, CA R+28
Neighborhoods with Similar Populations
- Brentwood, Washington, DC D+83
- Clintonville, Columbus, OH D+58
- South Boulevard Park Row, Dallas, TX D+68
- Little Lake City, Santa Fe Springs, CA D+24
- Brice-Tussing, Columbus, OH D+46
- Elmwood, Philadelphia, PA D+76
- Northeast, Anchorage, AK D+18
- Circle Area, Long Beach, CA D+40
- West Side, Long Beach, CA D+34
- Highlands, Lowell, MA D+28
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.