The flag of Port St. Lucie, Florida, is a white background with the city's seal in the center. The city's seal consists of a sun with its' center being a white circle containing a green outline of Florida, with some trees, and the words "INCORPORATED 1961" in white. The sun surrounded by gold rings and the city's full name, and the state's name. At the bottom of the city's seal, are the words "A City for All Ages".