Buffalo, IN -- U.S. Census Designated Place in Indiana Population (2000): 672 Housing Units (2000): 585 Land area (2000): 2.385245 sq. miles (6.177756 sq. km) Water area (2000): 0.164032 sq. miles (0.424841 sq. km) Total area (2000): 2.549277 sq. miles (6.602597 sq. km) FIPS code: 08992 Located within: Indiana (IN), FIPS 18 Location: 40.885501 N, 86.740858 W ZIP Codes (1990): Note: some ZIP codes may be omitted esp. for suburbs. Headwords: Buffalo, IN Buffalo