The Treasure Coast is a region in the southeast of the U.S. state of Florida. It borders the Atlantic Ocean and comprises Indian River, Martin, and St. Lucie counties. The region, whose name refers to the Spanish Treasure Fleet that was lost in a 1715 hurricane, evidently emerged from residents' desire to distinguish themselves from the Gold Coast to the south (the coast along Palm Beach, Broward, and Miami-Dade counties).
The Treasure Coast area includes parts of two metropolitan statistical areas (MSAs) designated by the Office of Management and Budget and used for statistical purposes by the Census Bureau and other agencies: the Port St. Lucie MSA (comprising St. Lucie and Martin counties) and the Sebastian–Vero Beach, Florida MSA (comprising Indian River County).