62681 -- U.S. ZIP code Municipality (1990): LAYTON, Illinois All ZIPs for this municipality (1990): 62681 Population (2000): 5089 Housing Units (2000): 2321 Land area (2000): 176.285366 sq. miles (456.576983 sq. km) Water area (2000): 0.672419 sq. miles (1.741557 sq. km) Total area (2000): 176.957785 sq. miles (458.318540 sq. km) Located within: Illinois (IL) Location: 40.134957 N, 90.552221 W