Centennial is a Democratic stronghold. About 81% of voters here vote Democratic and 19% Republican.
About 46% of adults in Centennial typically vote, below the U.S. average of about 62%. Among adults in Centennial, ~37% vote Democratic, ~9% Republican, and ~54% don't vote. The map below shows estimated turnout by block group.
How Centennial compares
Among neighborhoods within 5 miles, Centennial leans more Democratic than 11 of 14 neighbors.
Centennial runs about 41 points more Democratic than California as a whole.
Politics vary noticeably by block within Centennial. The east side is the most Democratic-leaning (D+66) and the northwest side is the least Democratic-leaning (D+52), a spread of about 15 points.
Why Centennial 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 Centennial, not a ranked or complete list of what matters most.
Dense areas vote Democratic. More than 99% of residents in Centennial live in densely developed areas, about 64 points above the U.S. average of 36%. High college attainment predicts Democratic voting, and Centennial sits in the top quarter (about 60%, above 81% of neighborhoods). A high never-married share predicts Democratic voting, and about 50% of adults in Centennial have never been married, above 81% of neighborhoods.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; Centennial, Redwood City, CA sits in the top 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 Centennial looks the way it does
Renters vote less often than owners. About 82% of households in Centennial rent, about 58 points above the U.S. average of 25%. Crowded housing lines up with lower turnout, and about 9% of homes in Centennial have more than one occupant per room, above 89% of neighborhoods. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Staumbaugh Heller, Redwood City, CA D+51
- Roosevelt-San Francisco, Redwood City, CA D+54
- Redwood Village, Redwood City, CA D+49
- Fair Oaks, North Fair Oaks, CA D+54
- Friendly Acres, Redwood City, CA D+47
- Emerald Lake Hills, Redwood City, CA D+54
- Farm Hills, Redwood City, CA D+59
- West Atherton, Atherton, CA D+43
- Downtown Menlo Park, Menlo Park, CA D+71
- Belle Haven, Menlo Park, CA D+50
Neighborhoods with Similar Populations
- East Lake, Chula Vista, CA D+16
- Fields Corner, Boston, MA D+49
- Westside, Binghamton, NY D+43
- Marconi Plaza-Packer Park, Philadelphia, PA R+23
- West Waco, Woodway, TX R+18
- Leonidas, New Orleans, LA D+70
- Downtown Durham, Durham, NC D+74
- Berkeley Place, Martinsburg, WV R+4
- Overlook, Summit, NJ D+27
- Downtown San Mateo, San Mateo, CA D+55
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.