Summer Home leans heavily Republican by roughly 36 points: about 32% of voters vote Democratic and 68% Republican.
About 30% of adults in Summer Home typically vote, below the U.S. average of about 62%. Among adults in Summer Home, ~10% vote Democratic, ~20% Republican, and ~70% don't vote. The map below shows estimated turnout by block group.
How Summer Home compares
Among cities within 25 miles, Summer Home leans more Republican than 27 of 39 neighbors.
Summer Home runs about 56 points more Republican than California as a whole. California leans Democratic overall, while Summer Home is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Summer Home. The southwest side is the most Republican-leaning (R+40) and the east side is the least Republican-leaning (R+28), a spread of about 13 points.
Why Summer Home 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 Summer Home, not a ranked or complete list of what matters most.
Summer Home votes against the grain of California. California leans Democratic overall, while Summer Home runs about 56 points more Republican. Low college attainment predicts Republican voting, and Summer Home sits in the bottom quarter (about 11%, below 90% of cities). A high family-household share predicts Republican voting, and about 94% of households in Summer Home are family households, in the top fraction of cities.
High-school completion, developed land, and voter turnout
Places that combine low high-school-completion share and a heavily developed built environment tend to turn out at a lower rate, as Summer Home, CA does.
Why turnout in Summer Home looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Summer Home 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 33% of households in Summer Home rent, above 88% of cities. Low high-school completion lines up with lower turnout, and about 80% of adults in Summer Home have completed high school, below 90% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Five Corners, CA R+43
- Manteca, CA R+8
- French Camp, CA R+5
- Simms, CA R+45
- Lathrop, CA D+3
- Ripon, CA R+35
- Garden Acres, CA D+15
- Van Allen, CA R+55
- August, CA D+15
Cities with Similar Populations
- Weston, MI R+50
- Scott, NY R+31
- Beards Fork, WV R+25
- Avawam, KY R+64
- Wellesley Island, NY R+12
- Atlanta, KS R+68
- Judson, MN R+34
- Littleton, UT R+75
- Galena, AK D+24
- Williams Center, OH R+57
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.