Mount Pleasant, SC Political Map | Democrat & Republican Areas in Mount Pleasant

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

Mount Pleasant leans slightly Republican by roughly 10 points: about 45% of voters vote Democratic and 55% Republican.

 

About 89% of adults in Mount Pleasant typically vote, above the U.S. average of about 62%. Among adults in Mount Pleasant, ~40% vote Democratic, ~49% Republican, and ~11% don't vote. The map below shows estimated turnout by block group.

How Mount Pleasant compares

Among cities within 25 miles, Mount Pleasant leans more Republican than 18 of 27 neighbors.

Mount Pleasant runs about 8 points more Democratic than South Carolina as a whole.

Politics vary noticeably by neighborhood within Mount Pleasant. The north side is the most Republican-leaning (R+21) and the east side is the least Republican-leaning (R+5), a spread of about 16 points.

Why Mount Pleasant 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 Mount Pleasant, not a ranked or complete list of what matters most.

Mount Pleasant votes Republican even though it is densely developed (about 63%, far above the South Carolina average of 24%). State and regional patterns outweigh the Democratic lean that density usually predicts here.

Cancer-screening access and voter turnout

Places with high colon-cancer-screening access tend to turn out at a higher rate; Mount Pleasant, SC sits in the top tenth nationally on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.

Why turnout in Mount Pleasant looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Mount Pleasant is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 75%, about 15 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 97% of adults in Mount Pleasant have completed high school, above 92% of cities. Learn more about the findings and methodology on the political spectrum map.

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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.