34986 -- 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): 6143 Housing Units (2000): 3351 Land area (2000): 18.079552 sq. miles (46.825822 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 18.079552 sq. miles (46.825822 sq. km) Located within: Florida (FL) Location: 27.341158 N, 80.397862 W