Jupiter Island leans Republican by roughly 30 points: about 35% of voters vote Democratic and 65% Republican.
About 86% of adults in Jupiter Island typically vote, above the U.S. average of about 62%. Among adults in Jupiter Island, ~30% vote Democratic, ~56% Republican, and ~14% don't vote. The map below shows estimated turnout by block group.
How Jupiter Island compares
Among cities within 25 miles, Jupiter Island leans more Republican than 18 of 28 neighbors.
Jupiter Island runs about 17 points more Republican than Florida as a whole.
Politics vary noticeably by neighborhood within Jupiter Island. The southeast side is the most Republican-leaning (R+32) and the south side is the least Republican-leaning (R+19), a spread of about 13 points.
Why Jupiter 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 Jupiter Island, not a ranked or complete list of what matters most.
Jupiter Island votes Republican even though it is densely developed (about 34%, well below the Florida average of 57%). Here an older population outweighs the Democratic lean that density usually predicts.
Homeownership and voter turnout
Places with homeowner-heavy households tend to turn out at a higher rate; Jupiter Island, FL sits in the top quarter nationally on this measure.
Why turnout in Jupiter Island looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Jupiter 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 70%, about 10 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 92% of households in Jupiter 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 97% of adults in Jupiter Island have completed high school, above 90% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Hobe Sound, FL R+28
- Tequesta, FL R+34
- Port Salerno, FL R+19
- Jupiter Inlet Colony, FL R+35
- Limestone Creek, FL D+20
- Jupiter, FL R+20
- Stuart, FL R+23
- Sewalls Point, FL R+31
- Jupiter Farms, FL R+38
- Juno Beach, FL R+32
Cities with Similar Populations
- North Buena Vista, IA R+48
- Bruni, TX R+19
- South Hope, ME R+19
- Hazelton, ND R+77
- South Hannibal, NY R+41
- Spring Creek, KY R+77
- Paineville, VA R+38
- Gilby, ND R+48
- Reid, NC R+35
- Bass, KY R+77
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.