Johnsonville leans Republican by roughly 30 points: about 35% of voters vote Democratic and 65% Republican.
About 69% of adults in Johnsonville typically vote, above the U.S. average of about 62%. Among adults in Johnsonville, ~24% vote Democratic, ~45% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How Johnsonville compares
Among cities within 25 miles, Johnsonville leans more Republican than 28 of 39 neighbors.
Johnsonville runs about 12 points more Republican than South Carolina as a whole.
Politics vary noticeably by neighborhood within Johnsonville. The northeast side runs the most Democratic (D+4) and the southeast side runs the most Republican (R+47), a spread of about 51 points.
Why Johnsonville leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Johnsonville. The lean here lands roughly where demographic data alone would predict.
Preventive-care access and voter turnout
Places with limited routine preventive-care access tend to turn out at a lower rate; Johnsonville, SC 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 Johnsonville looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Johnsonville is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Kingsburg, SC R+28
- Hannah, SC R+59
- Stuckey, SC D+35
- Hemingway, SC Even
- Leo, SC R+19
- Gresham, SC R+5
- Outland, SC R+34
- Nesmith, SC D+51
- Pamplico, SC R+28
- Eulonia, SC D+23
Cities with Similar Populations
- Union Grove, AL R+74
- Northlake, TX R+27
- Manchester, GA R+14
- Franklinville, NC R+60
- Staples, MN R+48
- St. Charles, MI R+36
- Sneads, FL R+45
- Columbus Grove, OH R+69
- Oracle, AZ R+26
- Baldwin, GA R+53
Sources and methodology
Precinct-level voting records used to fit the model come from South Carolina State Election Commission, 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.