Casa Grande leans slightly Republican by roughly 14 points: about 43% of voters vote Democratic and 57% Republican.
About 60% of adults in Casa Grande typically vote, near the U.S. average of about 62%. Among adults in Casa Grande, ~26% vote Democratic, ~34% Republican, and ~40% don't vote. The map below shows estimated turnout by block group.
How Casa Grande compares
Among cities within 25 miles, Casa Grande leans more Republican than 16 of 28 neighbors.
Casa Grande runs about 8 points more Republican than Arizona as a whole.
Politics vary noticeably by neighborhood within Casa Grande. The south side runs the most Democratic (Even) and the northeast side runs the most Republican (R+26), a spread of about 26 points.
Why Casa Grande 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 Casa Grande, not a ranked or complete list of what matters most.
Casa Grande votes Republican even though it is densely developed (about 53%, modestly above the Arizona average of 39%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; Casa Grande, AZ sits in the bottom quarter 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 Casa Grande looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Casa Grande is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. High food insecurity lines up with lower turnout, and about 21% of adults in Casa Grande report food insecurity, above 84% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Toltec, AZ R+4
- Eleven Mile Corner, AZ R+49
- Arizona City, AZ R+20
- Sacaton Flats, AZ D+63
- Chuichu, AZ D+35
- Sacaton, AZ D+50
- Coolidge, AZ R+12
- Eloy, AZ D+3
- Stanfield, AZ D+45
- La Palma, AZ R+46
Cities with Similar Populations
- Lorain, OH D+14
- San Luis Obispo, CA D+39
- Arcadia, CA D+14
- Castro Valley, CA D+33
- Waltham, MA D+43
- Joplin, MO R+33
- Wilkes-Barre, PA D+4
- North Richland Hills, TX R+21
- The Villages, FL R+29
- Hanford, CA R+15
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.