Grand Island, FL Political Map | Democrat & Republican Areas in Grand Island

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

Grand Island leans heavily Republican by roughly 42 points: about 29% of voters vote Democratic and 71% Republican.

 

About 81% of adults in Grand Island typically vote, above the U.S. average of about 62%. Among adults in Grand Island, ~23% vote Democratic, ~58% Republican, and ~19% don't vote. The map below shows estimated turnout by block group.

How Grand Island compares

Among cities within 25 miles, Grand Island leans more Republican than 30 of 59 neighbors.

Grand Island runs about 30 points more Republican than Florida as a whole.

Politics vary noticeably by neighborhood within Grand Island. The north side is the most Republican-leaning (R+64) and the southeast side is the least Republican-leaning (R+33), a spread of about 31 points.

Why Grand Island 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 Grand Island, not a ranked or complete list of what matters most.

Grand Island votes Republican even though it is densely developed (about 25%, far below the Florida average of 57%). State and regional patterns outweigh the Democratic lean that density usually predicts here.

Renting and voter turnout

Places with homeowner-heavy households tend to turn out at a higher rate; Grand Island, FL sits in the bottom quarter nationally on this measure.

Why turnout in Grand Island looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Grand Island 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 62%, about 5 points above the Florida average of 56%. Homeowners vote more often than renters, and about 92% of households in Grand Island own their home, about 17 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 96% of adults in Grand Island have completed high school, above 80% 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 Florida Division of 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.