They are descended from Iroquoian peoples who had relocated to Ohio from New York state in the mid-18th century. They have a tribal jurisdictional area in the northeast corner of Oklahoma and are headquartered in Grove. The tribe had more than 5,000 people in 2011. It includes the Cayuga people and is based in Oklahoma, United States. The Seneca–Cayuga Nation is one of three federally recognized tribes of Seneca people in the United States. Haudenosaunee, Wyandot, other Iroquoian peoples Flag of the Seneca-Cayuga Tribe of Oklahoma