Derry leans heavily Republican by roughly 48 points: about 26% of voters vote Democratic and 74% Republican.
About 73% of adults in Derry typically vote, above the U.S. average of about 62%. Among adults in Derry, ~19% vote Democratic, ~54% Republican, and ~27% don't vote. The map below shows estimated turnout by block group.
How Derry compares
Among cities within 25 miles, Derry leans more Republican than 10 of 49 neighbors.
Derry runs about 26 points more Republican than Louisiana as a whole.
Politics vary noticeably by neighborhood within Derry. The south side is the most Republican-leaning (R+72) and the east side is the least Republican-leaning (R+41), a spread of about 31 points.
Why Derry 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 Derry, not a ranked or complete list of what matters most.
Rural areas vote Republican. About 5% of residents in Derry live in densely developed areas, about 20 points below the Louisiana average of 25%. Low college attainment predicts Republican voting, and Derry sits in the bottom quarter (about 10%, below 92% of cities).
Walkability and Republican lean
Places with a low walkability score tend to lean Republican; Derry, LA sits in the bottom tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Derry looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Derry 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 61%, about 6 points above the Louisiana average of 55%. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Cloutierville, LA R+52
- Melrose, LA R+54
- Chopin, LA R+51
- Cypress, LA R+35
- Janie, LA R+81
- Gorum, LA R+58
- Provencal, LA R+83
- Montgomery, LA R+75
- Mora, LA R+75
Cities with Similar Populations
- Franklin, SD R+47
- Free Union, KY R+64
- Sharon, GA D+6
- Hamlin, KS R+58
- Haneyville, PA R+61
- Quinlan, OK R+77
- Blanchard, ND R+39
- La France, SC R+21
- Ladd, AR D+19
- Fairford, AL R+40
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Sources and methodology
Precinct-level voting records used to fit the model come from Louisiana 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.