Hobe Sound is an unincorporated area and census-designated place (CDP) in Martin County, Florida, United States, located along Florida's Treasure Coast. The population was 13,163 at the 2020 census, up from 11,521 in 2010. Geography Hobe Sound is located in southeastern Martin County at . It is an exurban area near the Atlantic Ocean, approximately north of West Palm Beach and southeast of Stuart. It stretches along the coast between Port Salerno to the north and Jonathan Dickinson State Park to the south. To the east, across South Jupiter Narrows, is Jupiter Island. Hobe Sound Public Beach, within the town of Jupiter Island, is one of Martin County's four guarded beaches. History Hobe Sound is the anglicized form of the name of a village of the Jaega, a Native American group that lived in the area before European settlement. The Spanish recorded the village name as "Jobe" or "Jove" . Jonathan Dickinson, whose party was shipwrecked near the town in 1696, spelled the name of the village "Hoe-bey". Parts of Hobe Sound were included in the Gomez grant given by Spain to Don Eusebio in 1815. In 1821, Gomez sold , including Jupiter Island, to Joseph Delespine for $1 per acre. Shortly after the turn of the 20th century, Henry Flagler built his railroad along the east coast of Florida, passing through Hobe Sound. This gradually created many opportunities including jobs, the birth of tourism, and other related industries. During the land boom of the 1920s elaborate plans were announced for Hobe Sound by the Olympia Improvement Corporation. Their goal was to create a town, in Greek style, where motion pictures could be produced. Street names bore such names as Zeus, Saturn, Mercury, Mars, Olympus, Venus, Pluto and Athena. For a brief time Hobe Sound was renamed "Picture City" and plans were presented for a movie picture production center. The boom collapsed after the 1928 Okeechobee hurricane, and the original name was restored. Street names remained, however, as did the cement streetlights along Dixie Highway. In 1924, the building which soon would become the new schoolhouse in Hobe Sound was constructed. The Martin County Board of Public Instruction secured the use of the new school building from the Picture City Corporation in 1925, and in October of that year, the Olympia School opened. The school was designated the "Picture City School" of Martin County. It remained in use as a