Holtville, CA Political Map | Democrat & Republican Areas in Holtville

By the BestNeighborhood data science team. Last updated May 2026.

Holtville leans slightly Republican by roughly 12 points: about 44% of voters vote Democratic and 56% Republican.

 

About 49% of adults in Holtville typically vote, below the U.S. average of about 62%. Among adults in Holtville, ~22% vote Democratic, ~27% Republican, and ~51% don't vote. The map below shows estimated turnout by block group.

How Holtville compares

Among cities within 25 miles, Holtville leans more Republican than 8 of 12 neighbors.

Holtville runs about 32 points more Republican than California as a whole. California leans Democratic overall, while Holtville is one of the few Republican-leaning pockets.

Politics vary noticeably by neighborhood within Holtville. The northeast side is the most Republican-leaning (R+39) and the west side is the least Republican-leaning (R+12), a spread of about 27 points.

Why Holtville 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 Holtville, not a ranked or complete list of what matters most.

Holtville votes Republican even though it is densely developed (about 68%, modestly above the California average of 58%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 79% of households in Holtville are family households, above 87% of cities. Holtville runs against the grain of California, a Republican-leaning pocket in a Democratic-leaning state.

Preventive-care access and voter turnout

Places with limited routine preventive-care access tend to turn out at a lower rate; Holtville, CA sits in the bottom tenth nationally on this measure. Dental visits do not drive turnout; the rate reflects income, insurance, and healthcare access, which line up with who votes.

Why turnout in Holtville looks the way it does

Areas with limited routine healthcare access turn out at lower rates. Holtville 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 49%, about 13 points below the California average of 62%. Renters vote less often than owners, and about 50% of households in Holtville rent, about 25 points above the U.S. average of 25%. High food insecurity lines up with lower turnout, and about 28% of adults in Holtville report food insecurity, above 94% of cities. Learn more about the findings and methodology on the political spectrum map.

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.