Suisun City leans Democratic by roughly 28 points: about 64% of voters vote Democratic and 36% Republican.
About 53% of adults in Suisun City typically vote, below the U.S. average of about 62%. Among adults in Suisun City, ~34% vote Democratic, ~19% Republican, and ~47% don't vote. The map below shows estimated turnout by block group.
How Suisun City compares
Among cities within 25 miles, Suisun City leans more Democratic than 24 of 46 neighbors.
Suisun City runs about 7 points more Democratic than California as a whole.
Politics vary noticeably by neighborhood within Suisun City. The north side runs the most Democratic (D+33) and the southeast side runs the most Republican (R+20), a spread of about 54 points.
Why Suisun City 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 Suisun City, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 82% of residents in Suisun City live in densely developed areas, about 46 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 38% of adults in Suisun City have never been married, above 91% of cities.
Paved land cover and Democratic lean
Places with extensive paved surfaces tend to lean Democratic; Suisun City, CA sits in the top tenth nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in Suisun City looks the way it does
Renters vote less often than owners. About 37% of households in Suisun City rent, about 12 points above the U.S. average of 25%. Crowded housing lines up with lower turnout, and about 7% of homes in Suisun City have more than one occupant per room, above 92% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Fairfield, CA D+22
- Travis Afb, CA Even
- Cordelia, CA Even
- Vacaville, CA D+5
- Denverton, CA D+17
- Elmira, CA R+30
- Binghamton, CA R+29
- Birds Landing, CA R+33
- American Canyon, CA D+29
- Benicia, CA D+15
Cities with Similar Populations
- Oakleaf Plantation, FL D+7
- Ferry Pass, FL R+15
- Maple Valley, WA D+17
- Garfield Heights, OH D+52
- Shenandoah, FL R+15
- Ridgecrest, CA R+25
- Franconia, VA D+46
- Jasper, AL R+67
- Summerfield, FL R+39
- Newtown, PA D+7
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.