Biscayne is a Democratic stronghold. About 80% of voters here vote Democratic and 20% Republican.
About 64% of adults in Biscayne typically vote, near the U.S. average of about 62%. Among adults in Biscayne, ~51% vote Democratic, ~13% Republican, and ~36% don't vote. The map below shows estimated turnout by block group.
How Biscayne compares
Among neighborhoods within 5 miles, Biscayne leans more Democratic than 5 of 11 neighbors.
Biscayne runs about 72 points more Democratic than Florida as a whole. Florida leans Republican overall, while Biscayne is one of the few Democratic-leaning pockets.
Politics vary noticeably by block within Biscayne. The east side is the most Democratic-leaning (D+74) and the northwest side is the least Democratic-leaning (D+47), a spread of about 27 points.
Why Biscayne leans the way it does
This analysis examined 14,881 data points per neighborhood to find what predicts political lean and turnout. The items below are a few correlations that stood out for Biscayne, not a ranked or complete list of what matters most.
Biscayne votes against the grain of Florida. Florida leans Republican overall, while Biscayne runs about 72 points more Democratic. Rural majority-Black areas vote Democratic, and about 67% of residents in Biscayne are Black or African American, above 94% of neighborhoods.
Paved land cover and Republican lean
Places with little paved surface tend to lean Republican; Biscayne, Jacksonville, FL 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 Biscayne looks the way it does
Turnout in Biscayne sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
- Turtle Creek, Jacksonville, FL D+75
- Highlands, Jacksonville, FL D+47
- Biscayne Terrace, Jacksonville, FL D+65
- Riverview, Jacksonville, FL D+57
- Sherwood Forest, Jacksonville, FL D+78
- Lake Forest, Jacksonville, FL D+66
- Forest Trails, Jacksonville, FL D+49
- Duval, Jacksonville, FL R+21
- Tallulah-North Shore, Jacksonville, FL D+50
- 45th and Moncrief, Jacksonville, FL D+78
Neighborhoods with Similar Populations
- Windsor Hills, View Park-Windsor Hills, CA D+84
- East Omaha, Omaha, NE D+22
- Kensington, Coral Springs, FL D+16
- Benton Park West, St. Louis, MO D+74
- North Hill, Springfield, OH D+14
- Sears Park Area, Abilene, TX R+7
- Tallulah-North Shore, Jacksonville, FL D+50
- Cooper, Minneapolis, MN D+76
- Friends of Friedrich Wilderness Park, San Antonio, TX Even
- Sussex Place, Alafaya, FL D+26
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.