Harbour Island is a true toss-up. About 48% of voters here vote Democratic and 52% Republican.
About 69% of adults in Harbour Island typically vote, above the U.S. average of about 62%. Among adults in Harbour Island, ~33% vote Democratic, ~36% Republican, and ~31% don't vote. The map below shows estimated turnout by block group.
How Harbour Island compares
Among neighborhoods within 5 miles, Harbour Island leans more Republican than 23 of 28 neighbors.
Harbour Island runs about 9 points more Democratic than Florida as a whole.
Why Harbour Island leans the way it does
Density, race composition, education, and family structure all sit close to their national averages in Harbour Island. The lean here lands roughly where demographic data alone would predict.
High-school completion, developed land, and voter turnout
Places that combine high-school-completion-heavy adults and a rural land-use pattern tend to turn out at a higher rate, as Harbour Island, Tampa, FL does.
Why turnout in Harbour Island looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Harbour 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 73%, about 13 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 99% of adults in Harbour Island have completed high school, above 89% of neighborhoods. Learn more about the findings and methodology on the political spectrum map.
Nearby Neighborhoods
Neighborhoods with Similar Populations
- Menlo Park, Tucson, AZ D+46
- Fashion District, Los Angeles, CA D+61
- River Park, Port St. Lucie, FL R+19
- Whiteaker, Eugene, OR D+62
- Ingrams Corner, East Providence, RI D+13
- The Island, Logan, UT Even
- Downtown Corona, Corona, CA D+17
- Lansingville, Youngstown, OH D+40
- Kensington, Tulsa, OK D+21
- Gardenland, Sacramento, CA D+24
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.