Pedro Valley leans heavily Democratic by roughly 32 points: about 66% of voters vote Democratic and 34% Republican.
About 50% of adults in Pedro Valley typically vote, below the U.S. average of about 62%. Among adults in Pedro Valley, ~33% vote Democratic, ~17% Republican, and ~50% don't vote. The map below shows estimated turnout by block group.
How Pedro Valley compares
Among cities within 25 miles, Pedro Valley leans more Democratic than 1 of 63 neighbors.
Pedro Valley runs about 12 points more Democratic than California as a whole.
Politics vary noticeably by neighborhood within Pedro Valley. The north side is the most Democratic-leaning (D+41) and the east side is the least Democratic-leaning (D+25), a spread of about 16 points.
Why Pedro Valley 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 Pedro Valley, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 41% of adults in Pedro Valley hold a bachelor's degree, about 13 points above the U.S. average of 28%.
Population density, never-married share, and Democratic lean
Places that combine high population density and a low never-married share tend to lean Democratic, as Pedro Valley, CA does.
Why turnout in Pedro Valley looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Pedro Valley 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 73%, about 13 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Millbrae Meadows, CA D+33
- Montara, CA D+49
- Pacifica, CA D+43
- San Bruno, CA D+43
- Moss Beach, CA D+50
- Millbrae, CA D+40
- El Granada, CA D+39
- South San Francisco, CA D+43
- Burlingame, CA D+52
- Hillsborough, CA D+41
Cities with Similar Populations
- Mount Hope, AL R+78
- Clermont, IN D+6
- Bass Lake, IN R+48
- Russellville, OH R+60
- Tower Lakes, IL D+7
- Faber, VA R+25
- East Brady, PA R+53
- Okeene, OK R+73
- Claudville, VA R+63
- Martville, NY R+39
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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.