Black Mountain Ranch leans Democratic by roughly 16 points: about 58% of voters vote Democratic and 42% Republican.
About 70% of adults in Black Mountain Ranch typically vote, above the U.S. average of about 62%. Among adults in Black Mountain Ranch, ~41% vote Democratic, ~29% Republican, and ~30% don't vote. The map below shows estimated turnout by block group.
How Black Mountain Ranch compares
Among neighborhoods within 5 miles, Black Mountain Ranch is the least Democratic-leaning.
Black Mountain Ranch runs about 4 points more Republican than California as a whole.
Politics vary noticeably by block within Black Mountain Ranch. The southeast side runs the most Democratic (D+24) and the northwest side runs the most Republican (R+4), a spread of about 28 points.
Why Black Mountain Ranch 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 Black Mountain Ranch, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 73% of adults in Black Mountain Ranch hold a bachelor's degree, about 44 points above the U.S. average of 28%.
Preventive-care access and voter turnout
Places with strong routine preventive-care access tend to turn out at a higher rate; Black Mountain Ranch, San Diego, CA sits in the top 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 Black Mountain Ranch looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Black Mountain Ranch 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 74%, about 14 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Rancho Penasquitos, San Diego, CA D+21
- Carmel Mountain, San Diego, CA D+26
- Rancho Bernadino, San Diego, CA D+16
- Sabre Springs, San Diego, CA D+20
- North City, San Diego, CA D+24
- Mira Mesa, San Diego, CA D+21
- Carmel Valley, San Diego, CA D+29
- Scripps Ranch, San Diego, CA D+20
- Sorrento Valley, San Diego, CA D+26
- Felicita, Escondido, CA D+8
Neighborhoods with Similar Populations
- South Lamar, Austin, TX D+49
- South Park Hill, Denver, CO D+74
- Northside, Riverside, CA D+17
- West End, Atlanta, GA D+85
- Downtown East, Las Vegas, NV D+36
- Windsor Hills, Austin, TX D+55
- Irvington, Portland, OR D+85
- Forest Grove, Worcester, MA D+30
- Woodstock, Portland, OR D+78
- Glencove, Vallejo, CA D+40
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.