Putnam -- U.S. County in Indiana Population (2000): 36019 Housing Units (2000): 13505 Land area (2000): 480.311271 sq. miles (1244.000427 sq. km) Water area (2000): 2.273019 sq. miles (5.887092 sq. km) Total area (2000): 482.584290 sq. miles (1249.887519 sq. km) Located within: Indiana (IN), FIPS 18 Location: 39.660304 N, 86.840246 W Headwords: Putnam Putnam, IN Putnam County Putnam County, IN