The Town of Jupiter Island is located next to the unincorporated community of Hobe Sound.

[3] 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,[6] and it has the highest per capita income by ZIP Code Tabulation Area of any place in the US.

[citation needed] The approximate coordinates for the Town of Jupiter Island is located at 27°3′26″N 80°6′49″W / 27.05722°N 80.11361°W / 27.05722; -80.11361 (27.057287, –80.113616).

[7] 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.

[8] As of the 2020 United States census, there were 804 people, 332 households, and 194 families residing in the town.

[12] As of the 2010 United States census, there were 817 people, 248 households, and 157 families residing in the town.

As of 2017, the largest self-reported ancestry groups in Jupiter Island are:[15] As of the census of 2000, there are 620 people, 285 households, and 190 families residing in the town.