The town of Jupiter Island is located on the barrier island called Jupiter Island, in Martin County, Florida, United States; the town is part of Florida's Treasure Coast. The town is located next to the unincorporated community of Hobe Sound. The population of Jupiter Island was 804 at the 2020 census. Some of the wealthiest people in the United States live in Jupiter Island: the June 1999 issue of Worth magazine ranked it #1 in the country for having the highest median home sale, and it has the highest per capita income by ZIP Code Tabulation Area of any place in the US. Geography The town of Jupiter Island is located at (27.057287, –80.113616). It occupies the barrier island of the same name from the Palm Beach County line in the south to the Hobe Sound National Wildlife Refuge boundary in the north. It is bordered to the west by Hobe Sound and South Jupiter Narrows, and to the east by the Atlantic Ocean. According to the United States Census Bureau, the town has a total area of , of which are land and , or 24.30%, are water. Demographics As of the census of 2010, there were 817 people, 429 households, and 219 families residing in the town. The population density was based on total area, and 303.4 people per square mile (117.1/km) based on land area. There were 762 housing units at an average density of 283.0 per square mile of land area (109.3/km). The racial makeup of the town was 94.37% White (88.49% non-Hispanic), 2.20% African American, 2.57% Asian, and 0.61% from other races. No one in the community identified as a Pacific Islander, or with two or more races. Hispanics or Latinos of any race were 5.32% of the population. There were 429 households, of which 4.4% had children under the age of 18 living with them, 49.4% were married couples living together, 1.4% had a female householder with no husband present, one had a male householder with no wife present, and 49.0% were non-families. 42.9% of households were made up of individuals; 18.9% had someone living alone who was 65 years of age or older. The average household size was 1.74 and the average family size was 2.25. The age distribution was 4.0% under the age of 18, 4.3% from 18 to 24, 16.9% from 25 to 44, 27.2% from 45 to 64, and 47.6%