Boulder Park leans heavily Republican by roughly 36 points: about 32% of voters vote Democratic and 68% Republican.
About 40% of adults in Boulder Park typically vote, below the U.S. average of about 62%. Among adults in Boulder Park, ~13% vote Democratic, ~27% Republican, and ~60% don't vote. The map below shows estimated turnout by block group.
How Boulder Park compares
Among cities within 25 miles, Boulder Park leans more Republican than 12 of 14 neighbors.
Boulder Park runs about 55 points more Republican than California as a whole. California leans Democratic overall, while Boulder Park is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Boulder Park. The east side is the most Republican-leaning (R+43) and the southwest side is the least Republican-leaning (R+31), a spread of about 12 points.
Why Boulder 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 Boulder Park, not a ranked or complete list of what matters most.
Rural areas vote Republican. Fewer than 1% of residents in Boulder Park live in densely developed areas, about 57 points below the California average of 58%. Low college attainment predicts Republican voting, and Boulder Park sits in the bottom quarter (about 9%, below 95% of cities). Boulder Park runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; Boulder Park, CA sits in the bottom tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in Boulder Park looks the way it does
Renters vote less often than owners. About 44% of households in Boulder Park rent, about 19 points above the U.S. average of 25%. Low high-school completion lines up with lower turnout, and about 79% of adults in Boulder Park have completed high school, below 92% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Jacumba, CA R+31
- Bankhead Springs, CA R+31
- Ocotillo, CA R+43
- Boulevard, CA R+27
- Live Oak Springs, CA R+27
- Tierra del Sol, CA R+27
- Barrett, CA R+27
- Boulder Oaks, CA R+29
- Campo, CA R+31
Cities with Similar Populations
- Scofield, UT R+51
- Perintown, OH R+32
- Frenchs Corners, PA R+65
- Boothe, AR R+70
- Hopewell, KS R+74
- Fork Mountain, TN R+71
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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.