34984 -- U.S. ZIP code Municipality (1990): PORT SAINT LUCIE, Florida All ZIPs for this municipality (1990): 34952 34953 34983 34984 34986 34987 34988 Population (2000): 9766 Housing Units (2000): 3810 Land area (2000): 5.768790 sq. miles (14.941098 sq. km) Water area (2000): 0.036194 sq. miles (0.093741 sq. km) Total area (2000): 5.804984 sq. miles (15.034839 sq. km) Located within: Florida (FL) Location: 27.273272 N, 80.347272 W