Anadarko Agency
- Apache Tribe of Oklahoma
- Caddo Nation of Oklahoma
- Comanche Nation
- Delaware Nation
- Fort Sill Apache Tribe of Oklahoma
- Kiowa Indian Tribe of Oklahoma
- Wichita and Affiliated Tribes
Concho Agency
- Cheyenne-Arapaho Tribes of Oklahoma
Horton Agency
- Iowa Tribe of Kansas & Nebraska
- Kickapoo Tribe in Kansas
- Prairie Band of Potawatomi Nation
- Sac and Fox Nation of Missouri
Pawnee Agency
- Otoe-Missouri Tribe
- Pawnee Nation of Oklahoma
- Tonkawa Tribe of Oklahoma
- Ponca Tribe of Oklahoma
Southern Plains Regional Office
- Absentee-Shawnee Tribe of Oklahoma
- Alabama Coushatta Tribe of Texas
- Citizen Potawatomi Nation
- Iowa Tribe of Oklahoma
- Kaw Nation
- Kickapoo Tribe of Oklahoma
- Kickapoo Traditional Tribe of Texas
- Sac & Fox Nation
