Glenhaven leans slightly Democratic by roughly 8 points: about 54% of voters vote Democratic and 46% Republican.
About 80% of adults in Glenhaven typically vote, above the U.S. average of about 62%. Among adults in Glenhaven, ~43% vote Democratic, ~37% Republican, and ~20% don't vote. The map below shows estimated turnout by block group.
How Glenhaven compares
Among cities within 25 miles, Glenhaven leans more Democratic than 23 of 30 neighbors.
Glenhaven runs about 12 points more Republican than California as a whole.
Politics vary noticeably by neighborhood within Glenhaven. The east side runs the most Democratic (D+9) and the southeast side runs the most Republican (R+3), a spread of about 12 points.
Why Glenhaven 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 Glenhaven, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 33% of adults in Glenhaven hold a bachelor's degree, above 79% of cities.
High-school completion, uninsured rate, and voter turnout
Places that combine high-school-completion-heavy adults and a low uninsured rate tend to turn out at a higher rate, as Glenhaven, CA does.
Why turnout in Glenhaven looks the way it does
Areas with high high-school completion turn out at higher rates. About 98% of adults in Glenhaven have completed high school, about 12 points above the California average of 86%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Clearlake Park, CA R+8
- Clearlake Oaks, CA Even
- Lucerne, CA R+10
- Kelseyville, CA D+2
- Soda Bay, CA Even
- Clearlake, CA Even
- Finley, CA R+10
- Nice, CA R+3
- Lakeport, CA R+7
- North Lakeport, CA R+18
Cities with Similar Populations
- Ongo, MO R+65
- Polvadera, NM R+19
- Noack, TX R+58
- Brownsburg, PA D+2
- Skidmore, MO R+66
- Foster Pond, IL R+50
- Maple Grove, WI R+51
- Merry Oaks, NC R+20
- Mutual, OK R+79
- Greig, NY R+46
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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.