Westmont is a Democratic stronghold. About 81% of voters here vote Democratic and 19% Republican.
About 39% of adults in Westmont typically vote, below the U.S. average of about 62%. Among adults in Westmont, ~31% vote Democratic, ~8% Republican, and ~61% don't vote. The map below shows estimated turnout by block group.
How Westmont compares
Among cities within 25 miles, Westmont leans more Democratic than 133 of 136 neighbors.
Westmont runs about 41 points more Democratic than California as a whole.
Politics vary noticeably by neighborhood within Westmont. The northwest side is the most Democratic-leaning (D+79) and the southeast side is the least Democratic-leaning (D+54), a spread of about 25 points.
Why Westmont leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Westmont, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in Westmont live in densely developed areas, about 64 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 54% of adults in Westmont have never been married, in the top fraction of cities.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; Westmont, CA sits in the bottom tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.
Why turnout in Westmont looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Westmont 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 46%, about 16 points below the California average of 62%. Renters vote less often than owners, and about 71% of households in Westmont rent, compared to around 53% in nearby cities. High food insecurity lines up with lower turnout, and about 41% of adults in Westmont report food insecurity, in the top fraction of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- West Athens, CA D+66
- Inglewood, CA D+60
- Lennox, CA D+37
- Hawthorne, CA D+44
- Gardena, CA D+39
- Willowbrook, CA D+54
- Florence-Graham, CA D+42
- Del Aire, CA D+28
- View Park-Windsor Hills, CA D+84
- Lawndale, CA D+27
Cities with Similar Populations
- North Olmsted, OH Even
- Roseburg, OR R+20
- South Riding, VA D+20
- Burlington, NJ D+36
- Bethel Park, PA D+5
- Lindenhurst, NY R+28
- Lockport, IL R+12
- Sun Valley, CA D+17
- Troy, OH R+33
- Melrose Park, IL D+22
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.