Indian Affairs | Osage Agency




Osage Agency

The Osage Agency is under the general supervision of the Line Officer in charge, the Agency Superintendent, which provides services to the Osage Nation and Osage Mineral Estate. The Agency branches include Executive Direction and Trust Services. Trust Services is divided into six sub-sections: Probate and Estate Services, Natural Resources, Mineral Subsurface Leasing, Mineral Lease Management, and Mineral Field Operations. The trust land overseen by the Agency consists of approximately 1.4 million acres which encompass the Osage Mineral Reserve covering Osage County, Oklahoma. Individual Restricted Lands cover 134,709.89 acres of Osage County.  Restricted Lands held outside the boundaries are approximately .11 acres.  The Osage Tribal Trust Land includes 1,819.125 acres which encompass three Indian villages, an Industrial Park, the Osage Agency Campus and Agency Reservoir, along with the St. John Cemetery and other acreage.


Robin Phillips, Superintendent - Osage Agency

Richard Winlock, Deputy Superintendent - Osage Agency







  • The Bureau of Indian Affairs (BIA) has determined that it is appropriate to review the regulations in 25 C.F.R. Part 226 - Leasing of Osage Reservation Lands for Oil and Gas Mining.  This review will consider whether, and to what extent, certain provisions in the regulations should be revised in order to strengthen BIA's management and administration of the Osage Mineral Estate.  As part of the review process, the BIA is engaging in consultation with tribal representatives to seek input regarding the need for any such revisions or updates to the regulations.  Information and documents relating to this process are available on Office of Regulatory Affairs and Collaborative Action website at the following link:



 Osage Tour Aug 2010

Osage Tour, August 2010


Osage Agency Fire Management, June 2008.