Thomasboro, IL -- U.S. village in Illinois Population (2000): 1233 Housing Units (2000): 525 Land area (2000): 1.035141 sq. miles (2.681002 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.035141 sq. miles (2.681002 sq. km) FIPS code: 75107 Located within: Illinois (IL), FIPS 17 Location: 40.242025 N, 88.187745 W ZIP Codes (1990): 61878 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Thomasboro, IL Thomasboro