San Luis, AZ Political Map | Democrat & Republican Areas in San Luis

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

San Luis is a true toss-up. About 52% of voters here vote Democratic and 48% Republican.

 

About 39% of adults in San Luis typically vote, below the U.S. average of about 62%. Among adults in San Luis, ~20% vote Democratic, ~19% Republican, and ~61% don't vote. The map below shows estimated turnout by block group.

How San Luis compares

Among cities within 25 miles, San Luis leans more Democratic than 3 of 7 neighbors.

San Luis runs about 10 points more Democratic than Arizona as a whole.

Politics vary noticeably by neighborhood within San Luis. The southwest side runs the most Democratic (D+25) and the east side runs the most Republican (R+19), a spread of about 45 points.

Why San Luis leans the way it does

Density, race composition, education, and family structure all sit close to their national averages in San Luis. The lean here lands roughly where demographic data alone would predict.

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; San Luis, AZ sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.

Why turnout in San Luis looks the way it does

Areas with limited routine healthcare access turn out at lower rates. San Luis 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 41%, about 13 points below the Arizona average of 54%. High food insecurity lines up with lower turnout, and about 36% of adults in San Luis report food insecurity, above 98% of cities. Low high-school completion lines up with lower turnout, and about 59% of adults in San Luis have completed high school, in the bottom fraction 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 Arizona 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.