Jacumba leans heavily Republican by roughly 32 points: about 34% of voters vote Democratic and 66% Republican.
About 25% of adults in Jacumba typically vote, below the U.S. average of about 62%. Among adults in Jacumba, ~8% vote Democratic, ~17% Republican, and ~75% don't vote. The map below shows estimated turnout by block group.
How Jacumba compares
Among cities within 25 miles, Jacumba leans more Republican than 10 of 15 neighbors.
Jacumba runs about 52 points more Republican than California as a whole. California leans Democratic overall, while Jacumba is one of the few Republican-leaning pockets.
Why Jacumba 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 Jacumba, not a ranked or complete list of what matters most.
Jacumba votes against the grain of California. California leans Democratic overall, while Jacumba runs about 52 points more Republican. Rural areas vote Republican, and Jacumba sits in the bottom quarter on density (about 4%, below 89% of cities). A high family-household share predicts Republican voting, and about 83% of households in Jacumba are family households, above 94% of cities.
Developed land and Republican lean
Places with a rural land-use pattern tend to lean Republican; Jacumba, CA sits in the bottom quarter nationally on this measure. Developed land does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Jacumba looks the way it does
Renters vote less often than owners. About 70% of households in Jacumba rent, about 45 points above the U.S. average of 25%. Low high-school completion lines up with lower turnout, and more than 99% of adults in Jacumba have completed high school, in the top fraction of cities. High-crime urban areas turn out at lower rates, and Jacumba sits in the top 15% on a violent-crime measure. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Bankhead Springs, CA R+31
- Boulder Park, CA R+35
- Boulevard, CA R+27
- Tierra del Sol, CA R+27
- Live Oak Springs, CA R+27
- Barrett, CA R+27
- Ocotillo, CA R+43
- Campo, CA R+31
- Boulder Oaks, CA R+29
- Cameron Corners, CA R+31
Cities with Similar Populations
- Fowlstown, GA D+17
- Linn, KS R+73
- Harg, MO R+4
- Reistville, PA R+62
- Jerico Springs, MO R+69
- Hebo, OR R+14
- Gorham, KS R+73
- Velvet Ridge, AR R+74
- Tyson, AL Even
- Whitley, VA R+46
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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.