Calpella leans Democratic by roughly 16 points: about 58% of voters vote Democratic and 42% Republican.
About 27% of adults in Calpella typically vote, below the U.S. average of about 62%. Among adults in Calpella, ~16% vote Democratic, ~11% Republican, and ~73% don't vote. The map below shows estimated turnout by block group.
How Calpella compares
Among cities within 25 miles, Calpella leans more Democratic than 13 of 21 neighbors.
Politically, Calpella sits close to the rest of California.
Politics vary noticeably by neighborhood within Calpella. The southeast side is the most Democratic-leaning (D+18) and the northeast side is the least Democratic-leaning (D+6), a spread of about 13 points.
Why Calpella 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 Calpella, not a ranked or complete list of what matters most.
Areas with many never-married adults vote Democratic. About 43% of adults in Calpella have never been married, modestly above similar-sized cities (around 32%).
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Calpella, CA sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Calpella looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Calpella is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 46% of households in Calpella rent, about 21 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 22% of adults in Calpella report food insecurity, above 86% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Ukiah, CA D+18
- Talmage, CA D+11
- Vichy Springs, CA D+26
- Redwood Valley, CA R+4
- Boonville, CA D+35
- Philo, CA D+46
- Potter Valley, CA Even
- Hopland, CA D+11
- Navarro, CA D+42
- Muir, CA D+10
Cities with Similar Populations
- West Newfield, ME R+27
- Clayton Village, MS D+11
- Hudson, ME R+35
- Hopland, CA D+11
- Rileyville, VA R+48
- Stone Creek, OH R+66
- Snow Lake Shores, MS Even
- Hereford, PA R+32
- Ikes, LA R+88
- Wever, IA R+35
All Local Stats
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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.