34951 -- U.S. ZIP code Municipality (1990): FORT PIERCE, Florida All ZIPs for this municipality (1990): 34945 34946 34947 34949 34950 34951 34981 34982 Population (2000): 12792 Housing Units (2000): 6603 Land area (2000): 24.550988 sq. miles (63.586764 sq. km) Water area (2000): 0.217201 sq. miles (0.562549 sq. km) Total area (2000): 24.768189 sq. miles (64.149313 sq. km) Located within: Florida (FL) Location: 27.538310 N, 80.405261 W