Quincy leans Republican by roughly 24 points: about 38% of voters vote Democratic and 62% Republican.
About 66% of adults in Quincy typically vote, near the U.S. average of about 62%. Among adults in Quincy, ~25% vote Democratic, ~41% Republican, and ~34% don't vote. The map below shows estimated turnout by block group.
How Quincy compares
Among cities within 25 miles, Quincy leans more Republican than 20 of 22 neighbors.
Quincy runs about 45 points more Republican than California as a whole. California leans Democratic overall, while Quincy is one of the few Republican-leaning pockets.
Politics vary noticeably by neighborhood within Quincy. The northeast side is the most Republican-leaning (R+30) and the southwest side is the least Republican-leaning (R+17), a spread of about 13 points.
Why Quincy 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 Quincy, not a ranked or complete list of what matters most.
Quincy votes against the grain of California. California leans Democratic overall, while Quincy runs about 45 points more Republican.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Quincy, CA sits in the top quarter nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Quincy looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Quincy is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 66%, about 6 points above the U.S. average of 60%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- East Quincy, CA R+21
- Spanish Ranch, CA R+29
- Keddie, CA R+24
- Indian Falls, CA R+6
- Meadow Valley, CA R+12
- Greenhorn, CA R+14
- Crescent Mills, CA R+3
- Taylorsville, CA R+12
Cities with Similar Populations
- Westtown, NY R+32
- Varnville, SC D+4
- North Wildwood, NJ R+27
- Crested Butte, CO D+54
- Waynesburg, KY R+72
- Ixonia, WI R+35
- Edgewood, FL Even
- Central City, NE R+51
- Eutaw, AL D+52
- West Creek, NJ R+39
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.