Mendota leans slightly Democratic by roughly 12 points: about 56% of voters vote Democratic and 44% Republican.
About 28% of adults in Mendota typically vote, below the U.S. average of about 62%. Among adults in Mendota, ~16% vote Democratic, ~12% Republican, and ~72% don't vote. The map below shows estimated turnout by block group.
How Mendota compares
Among cities within 25 miles, Mendota leans more Democratic than 19 of 20 neighbors.
Mendota runs about 8 points more Republican than California as a whole.
Politics vary noticeably by neighborhood within Mendota. The east side runs the most Democratic (D+22) and the west side runs the most Republican (Even), a spread of about 24 points.
Why Mendota 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 Mendota, not a ranked or complete list of what matters most.
Dense areas vote Democratic. About 56% of residents in Mendota live in densely developed areas, about 20 points above the U.S. average of 36%. A high never-married share predicts Democratic voting, and about 51% of adults in Mendota have never been married, above 98% of cities.
Population density and Democratic lean
Places with high population density tend to lean Democratic; Mendota, CA sits in the top tenth nationally on this measure.
Why turnout in Mendota looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Mendota 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 34%, about 28 points below the California average of 62%. Renters vote less often than owners, and about 59% of households in Mendota rent, about 34 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 51% of adults in Mendota report food insecurity, in the top fraction of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Firebaugh, CA D+8
- Tranquillity, CA D+9
- San Joaquin, CA D+24
- La Vina, CA R+22
- Three Rocks, CA R+4
- Kerman, CA R+6
- Cantua Creek, CA Even
- Oro Loma, CA R+24
- South Dos Palos, CA R+14
Cities with Similar Populations
- Oak Park, CA D+24
- Covington, TN R+19
- Colchester, VT D+12
- Western Springs, IL D+21
- Ladys Island, SC R+19
- Grove City, PA R+27
- Kendallville, IN R+42
- Weddington, NC R+21
- Ojai, CA D+33
- La Grange Park, IL D+34
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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.