62281 -- U.S. ZIP code Municipality (1990): SAINT JACOB, Illinois All ZIPs for this municipality (1990): 62281 Population (2000): 1719 Housing Units (2000): 661 Land area (2000): 37.620513 sq. miles (97.436677 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 37.620513 sq. miles (97.436677 sq. km) Located within: Illinois (IL) Location: 38.706847 N, 89.777395 W