Port Gibson, MS Political Map | Democrat & Republican Areas in Port Gibson

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

Port Gibson is a Democratic stronghold. About 86% of voters here vote Democratic and 14% Republican.

 

About 67% of adults in Port Gibson typically vote, near the U.S. average of about 62%. Among adults in Port Gibson, ~58% vote Democratic, ~9% Republican, and ~33% don't vote. The map below shows estimated turnout by block group.

How Port Gibson compares

Among cities within 25 miles, Port Gibson leans more Democratic than 30 of 34 neighbors.

Port Gibson runs about 96 points more Democratic than Mississippi as a whole. Mississippi leans Republican overall, while Port Gibson is one of the few Democratic-leaning pockets.

Politics vary noticeably by neighborhood within Port Gibson. The south side is the most Democratic-leaning (D+81) and the east side is the least Democratic-leaning (D+59), a spread of about 22 points.

Why Port Gibson 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 Gibson, not a ranked or complete list of what matters most.

Density combined with diversity predicts Democratic voting. Non-Hispanic white share in Port Gibson is about 10%, about 63 points below the U.S. average of 72%. A high never-married share predicts Democratic voting, and about 46% of adults in Port Gibson have never been married, above 97% of cities. Port Gibson runs against the grain of Mississippi, a Democratic-leaning pocket in a Republican-leaning state.

Preventive-care access and voter turnout

Places with limited routine preventive-care access tend to turn out at a lower rate; Port Gibson, MS sits in the bottom tenth 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 Port Gibson looks the way it does

Limited routine healthcare access lines up with lower turnout, and Port Gibson sits in the bottom quarter on routine-care measures. Learn more about the findings and methodology on the political spectrum map.

Sources and methodology

Precinct-level voting records used to fit the model come from Mississippi 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.