Spring Bay, IL -- U.S. village in Illinois Population (2000): 436 Housing Units (2000): 187 Land area (2000): 0.805947 sq. miles (2.087394 sq. km) Water area (2000): 0.330893 sq. miles (0.857010 sq. km) Total area (2000): 1.136840 sq. miles (2.944404 sq. km) FIPS code: 71604 Located within: Illinois (IL), FIPS 17 Location: 40.824261 N, 89.523330 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Spring Bay, IL Spring Bay