38603 leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.
About 70% of adults in 38603 typically vote, above the U.S. average of about 62%. Among adults in 38603, ~20% vote Democratic, ~50% Republican, and ~30% don't vote. The map below shows estimated turnout by block group.
How 38603 compares
Among zip codes within 15 miles, 38603 leans more Republican than 2 of 4 neighbors.
38603 runs about 19 points more Republican than Mississippi as a whole.
Politics vary noticeably by block within 38603. The northwest side runs the most Democratic (D+7) and the southeast side runs the most Republican (R+65), a spread of about 73 points.
Why 38603 leans the way it does
This analysis examined 14,881 data points per zip code to find what predicts political lean and turnout. The items below are a few correlations that stood out for 38603, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 6% of residents in 38603 live in densely developed areas, about 9 points below the Mississippi average of 15%. Low college attainment predicts Republican voting, and 38603 sits in the bottom quarter (about 15%, below 82% of zip codes).
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; 38603, MS sits in the bottom quarter nationally on this measure. Paved ground does not change how people vote; it mostly reflects how urban and built-up a place is.
Why turnout in 38603 looks the way it does
Homeowners vote more often than renters. About 90% of households in 38603 own their home, about 14 points above the Mississippi average of 77%. Learn more about the findings and methodology on the political spectrum map.
Nearby Zip Codes
Zip Codes with Similar Populations
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.