The Omaha are a federally recognized Native American tribe which lives on the Omaha Reservation in northeastern Nebraska and western Iowa, United States. The Omaha Indian Reservation lies primarily in the southern part of Thurston County and northeastern Cuming County, Nebraska, but small parts extend into the northeast corner of Burt County and across the Missouri River into Monona County, Iowa. Its total land area is 796.355 km2 (307.474 sq mi) and a population of 5,194 was recorded in the 2000 census. Its largest community is Macy.