The operations of the Iowa Tribe of Kansas and Nebraska are based on its federally established reservation covering approximately 12,038 acres across portions of Brown County and Doniphan County in Northeast Kansas and Richardson County in Southeast Nebraska. The reservation was established and modified pursuant to a series of treaties, with the current boundaries established in the Treaty of March 6, 1861. The Iowa Tribe of Kansas and Nebraska currently controls approximately 4,860 acres of its reservation with most of this land held in trust.