Troy Grove, IL -- U.S. village in Illinois Population (2000): 305 Housing Units (2000): 108 Land area (2000): 0.686567 sq. miles (1.778201 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 0.686567 sq. miles (1.778201 sq. km) FIPS code: 76225 Located within: Illinois (IL), FIPS 17 Location: 41.465461 N, 89.081204 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Troy Grove, IL Troy Grove