63648 -- U.S. ZIP code Municipality (1990): IRONDALE, Missouri All ZIPs for this municipality (1990): 63648 Population (2000): 1355 Housing Units (2000): 574 Land area (2000): 27.449845 sq. miles (71.094770 sq. km) Water area (2000): 0.025736 sq. miles (0.066657 sq. km) Total area (2000): 27.475581 sq. miles (71.161427 sq. km) Located within: Missouri (MO) Location: 37.827126 N, 90.683256 W