Harristown, IL -- U.S. village in Illinois Population (2000): 1338 Housing Units (2000): 525 Land area (2000): 1.856033 sq. miles (4.807103 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.856033 sq. miles (4.807103 sq. km) FIPS code: 33227 Located within: Illinois (IL), FIPS 17 Location: 39.842673 N, 89.069495 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Harristown, IL Harristown