St. Augustine leans heavily Republican by roughly 44 points: about 28% of voters vote Democratic and 72% Republican.
About 81% of adults in St. Augustine typically vote, above the U.S. average of about 62%. Among adults in St. Augustine, ~23% vote Democratic, ~58% Republican, and ~19% don't vote. The map below shows estimated turnout by block group.
How St. Augustine compares
Among cities within 25 miles, St. Augustine leans more Republican than 38 of 60 neighbors.
St. Augustine runs about 56 points more Republican than Illinois as a whole. Illinois leans Democratic overall, while St. Augustine is one of the few Republican-leaning pockets.
Why St. Augustine 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 St. Augustine, not a ranked or complete list of what matters most.
Areas with a high white share and below-average college attainment vote Republican. In St. Augustine, about 99% of residents are non-Hispanic white, about 26 points above the U.S. average of 72%; about 12% of adults hold a bachelor's degree, about 14 points below the Illinois average of 27%. Car-dependent areas vote Republican, and about 85% of residents in St. Augustine drive to work alone, above 81% of cities. St. Augustine runs against the grain of Illinois, a Republican-leaning pocket in a Democratic-leaning state.
Never-married share, developed land, and voter turnout
Places that combine a low never-married share and a rural land-use pattern tend to turn out at a higher rate, as St. Augustine, IL does.
Why turnout in St. Augustine looks the way it does
Turnout in St. Augustine sits close to the national pattern. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Checkrow, IL R+45
- Abingdon, IL R+32
- Avon, IL R+44
- London Mills, IL R+46
- Greenbush, IL R+42
- Berwick, IL R+45
- Prairie City, IL R+55
- Ellisville, IL R+51
- Maquon, IL R+45
- Gilson, IL R+41
Cities with Similar Populations
- Tofte, MN D+28
- Park View, WV R+60
- Lowsville, WV R+24
- Petersville, IA R+46
- Big Springs, WV R+69
- Pekin Heights, IL R+49
- Payne, GA D+70
- Thayer Corners, NY R+36
- Lake Margrethe, MI R+35
- Norwood Hollow, NC R+39
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Sources and methodology
Precinct-level voting records used to fit the model come from Illinois State Board of 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.