Three Rocks is a true toss-up. About 48% of voters here vote Democratic and 52% Republican.
About 38% of adults in Three Rocks typically vote, below the U.S. average of about 62%. Among adults in Three Rocks, ~18% vote Democratic, ~20% Republican, and ~62% don't vote. The map below shows estimated turnout by block group.
How Three Rocks compares
Among cities within 25 miles, Three Rocks leans more Republican than 6 of 9 neighbors.
Three Rocks runs about 24 points more Republican than California as a whole. California leans Democratic overall, while Three Rocks is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Three Rocks. The south side is the most split-leaning (R+38) and the southeast side is the least split-leaning (Even), a spread of about 36 points.
Why Three Rocks 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 Three Rocks, not a ranked or complete list of what matters most.
Three Rocks votes against the grain of California. California leans Democratic overall, while Three Rocks runs about 24 points more Republican.
Population density and Republican lean
Places with low population density tend to lean Republican; Three Rocks, CA sits in the bottom tenth nationally on this measure.
Why turnout in Three Rocks looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Three Rocks is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 33%, about 29 points below the California average of 62%. Renters vote less often than owners, and about 58% of households in Three Rocks rent, about 33 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 48% of adults in Three Rocks report food insecurity, in the top fraction of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Cantua Creek, CA Even
- Tranquillity, CA D+9
- San Joaquin, CA D+24
- Five Points, CA R+4
- Mendota, CA D+12
- Helm, CA R+21
- Panoche, CA R+26
- Kerman, CA R+6
- Firebaugh, CA D+8
- Coalinga, CA R+14
Cities with Similar Populations
- Poplar Hill, VA R+62
- Talmage, NE R+55
- Kincaid, KS R+65
- King And Queen Court House, VA R+34
- Rake, IA R+44
- Powellsville, OH R+61
- Midvale, MO R+72
- Milford Center, NY R+24
- Mc Graws, WV R+77
- West Washington, ME R+30
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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.