Dover, IL -- U.S. village in Illinois Population (2000): 172 Housing Units (2000): 68 Land area (2000): 0.268068 sq. miles (0.694292 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.268068 sq. miles (0.694292 sq. km) FIPS code: 20526 Located within: Illinois (IL), FIPS 17 Location: 41.435327 N, 89.395830 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Dover, IL Dover