63549 -- U.S. ZIP code Municipality (1990): LA PLATA, Missouri All ZIPs for this municipality (1990): 63549 Population (2000): 2585 Housing Units (2000): 1152 Land area (2000): 136.178397 sq. miles (352.700413 sq. km) Water area (2000): 0.157562 sq. miles (0.408084 sq. km) Total area (2000): 136.335959 sq. miles (353.108497 sq. km) Located within: Missouri (MO) Location: 40.018881 N, 92.503089 W