Bluffton, IN -- U.S. city in Indiana Population (2000): 9536 Housing Units (2000): 4197 Land area (2000): 6.609619 sq. miles (17.118833 sq. km) Water area (2000): 0.006631 sq. miles (0.017174 sq. km) Total area (2000): 6.616250 sq. miles (17.136007 sq. km) FIPS code: 06220 Located within: Indiana (IN), FIPS 18 Location: 40.737991 N, 85.172223 W ZIP Codes (1990): 46714 Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Bluffton, IN Bluffton