62615 -- U.S. ZIP code Municipality (1990): AUBURN, Illinois All ZIPs for this municipality (1990): 62615 Population (2000): 5424 Housing Units (2000): 2153 Land area (2000): 54.676068 sq. miles (141.610359 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 54.676068 sq. miles (141.610359 sq. km) Located within: Illinois (IL) Location: 39.588902 N, 89.751774 W