60553 -- U.S. ZIP code Municipality (1990): STEWARD, Illinois All ZIPs for this municipality (1990): 60553 Population (2000): 700 Housing Units (2000): 262 Land area (2000): 46.251914 sq. miles (119.791901 sq. km) Water area (2000): 0.035815 sq. miles (0.092761 sq. km) Total area (2000): 46.287729 sq. miles (119.884662 sq. km) Located within: Illinois (IL) Location: 41.830628 N, 89.017048 W