North Valley San Diego leans slightly Democratic by roughly 10 points: about 55% of voters vote Democratic and 45% Republican.
About 56% of adults in North Valley San Diego typically vote, below the U.S. average of about 62%. Among adults in North Valley San Diego, ~31% vote Democratic, ~25% Republican, and ~44% don't vote. The map below shows estimated turnout by block group.
How North Valley San Diego compares
Among neighborhoods within 5 miles, North Valley San Diego leans more Democratic than 1 of 6 neighbors.
North Valley San Diego runs about 10 points more Republican than California as a whole.
Politics vary noticeably by block within North Valley San Diego. The south side is the most Democratic-leaning (D+14) and the west side is the least Democratic-leaning (Even), a spread of about 12 points.
Why North Valley San Diego leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in North Valley San Diego. The lean here lands roughly where demographic data alone would predict.
Cancer-screening access and voter turnout
Places with low colon-cancer-screening access tend to turn out at a lower rate; North Valley San Diego, Oceanside, CA sits in the bottom quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in North Valley San Diego looks the way it does
Crowded housing lines up with lower turnout. About 9% of homes in North Valley San Diego have more than one occupant per room, above 90% of neighborhoods. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- San Luis Rey, Oceanside, CA D+11
- Guajome, Oceanside, CA Even
- Ivey Ranch-Rancho del Oro, Oceanside, CA D+13
- Peacock, Oceanside, CA D+10
- East Side Capistrano, Oceanside, CA D+15
- Fire Mountain, Oceanside, CA D+19
- Lake, Oceanside, CA D+3
- Townsite, Oceanside, CA D+31
- South Oceanside, Oceanside, CA D+19
- Camp Pendleton South, Oceanside, CA R+25
Neighborhoods with Similar Populations
- Buffalo, Las Vegas, NV D+18
- Eastside, Riverside, CA D+31
- Calallen, Corpus Christi, TX R+36
- Blueberry Hill-Brigadoon-Stoneybrook, Lexington, KY D+28
- Bagley, Detroit, MI D+89
- Garnsey, Valley Village, CA D+35
- Byberry, Philadelphia, PA R+12
- Cedar Hills-Cedar Mill, Portland, OR D+49
- Kamms Corner, Cleveland, OH D+22
- Lake View, Paterson, NJ D+5
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.