Port Royal leans slightly Republican by roughly 6 points: about 47% of voters vote Democratic and 53% Republican.
About 52% of adults in Port Royal typically vote, below the U.S. average of about 62%. Among adults in Port Royal, ~24% vote Democratic, ~28% Republican, and ~48% don't vote. The map below shows estimated turnout by block group.
How Port Royal compares
Among cities within 25 miles, Port Royal leans more Republican than 18 of 33 neighbors.
Port Royal runs about 12 points more Democratic than South Carolina as a whole.
Politics vary noticeably by neighborhood within Port Royal. The northeast side runs the most Democratic (D+5) and the southwest side runs the most Republican (R+20), a spread of about 26 points.
Why Port Royal 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 Port Royal, not a ranked or complete list of what matters most.
Port Royal votes Republican even though it is densely developed (about 33%, modestly above the South Carolina average of 24%). State and regional patterns outweigh the Democratic lean that density usually predicts here. A high family-household share predicts Republican voting, and about 76% of households in Port Royal are family households, above 79% of cities.
Homeownership and voter turnout
Places with renter-heavy households tend to turn out at a lower rate; Port Royal, SC sits in the bottom tenth nationally on this measure.
Why turnout in Port Royal looks the way it does
Areas with limited routine healthcare access turn out at lower rates. Port Royal is in the bottom quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. Renters vote less often than owners, and about 67% of households in Port Royal rent, compared to around 23% in nearby cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Burton, SC D+8
- Beaufort, SC R+2
- Parris Island, SC D+66
- Ladys Island, SC R+19
- Laurel Bay, SC R+17
- St. Helena Island, SC D+22
- Nevadun, SC R+8
- Lands End, SC R+6
- Hilton Head Island, SC R+11
Cities with Similar Populations
- Sturgeon Bay, WI R+3
- Ashland City, TN R+55
- Teays Valley, WV R+32
- Southern Pines, NC D+5
- Pearl River, NY R+24
- Seven Corners, VA D+37
- Crete, IL D+19
- Otsego, MN R+24
- Burlington, WA Even
- North New Hyde Park, NY R+12
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.