Williamsport, IN -- U.S. town in Indiana Population (2000): 1935 Housing Units (2000): 809 Land area (2000): 1.052533 sq. miles (2.726048 sq. km) Water area (2000): 0.000000 sq. miles (0.000000 sq. km) Total area (2000): 1.052533 sq. miles (2.726048 sq. km) FIPS code: 84410 Located within: Indiana (IN), FIPS 18 Location: 40.286834 N, 87.291998 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Williamsport, IN Williamsport