Deer Park leans heavily Democratic by roughly 30 points: about 65% of voters vote Democratic and 35% Republican.
About 76% of adults in Deer Park typically vote, above the U.S. average of about 62%. Among adults in Deer Park, ~49% vote Democratic, ~27% Republican, and ~24% don't vote. The map below shows estimated turnout by block group.
How Deer Park compares
Among cities within 25 miles, Deer Park leans more Democratic than 16 of 38 neighbors.
Deer Park runs about 10 points more Democratic than California as a whole.
Politics vary noticeably by neighborhood within Deer Park. The southwest side is the most Democratic-leaning (D+37) and the northwest side is the least Democratic-leaning (D+25), a spread of about 12 points.
Why Deer Park 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 Deer Park, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 47% of adults in Deer Park hold a bachelor's degree, about 18 points above the U.S. average of 28%.
High-school completion and voter turnout
Places with high-school-completion-heavy adults tend to turn out at a higher rate; Deer Park, CA sits in the top tenth nationally on this measure.
Why turnout in Deer Park looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Deer Park is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 70%, about 10 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 99% of adults in Deer Park have completed high school, above 97% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- St. Helena, CA D+37
- Angwin, CA D+26
- Rutherford, CA D+39
- Calistoga, CA D+41
- Pope Valley, CA R+4
- Kenwood, CA D+53
- Oakville, CA D+31
- Yountville, CA D+32
- Glen Ellen, CA D+54
- Kellog, CA D+25
Cities with Similar Populations
- Kerr Hill, MI R+38
- Ogden, OH R+55
- Vaughan, MS R+16
- Shongopovi, AZ D+61
- Verna, FL R+58
- Shaw Mills, ME R+13
- Kelawea, HI D+15
- Zip City, AL R+75
- Shines Crossroads, NC R+34
- Mars Hill, ME R+41
All Local Stats
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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.