Names
- Navajo Nation2
- Navajo Tribe of Arizona, New Mexico & Utah2
- Osage Nation15
- Osage Tribe, Oklahoma18
- Otoe Nation1
- Otoe-Missouria Tribe of Indians7
- Otoe-Missouria Tribe of Nation1
- Ottawa Indians1
- Ottawa Tribe9
- Ottawa Tribe of Oklahoma21
- Pawnee Indian Tribe of Oklahoma11
- Pawnee Nation of Oklahoma21
- Ponca Indians1
- Ponca Nation5
- Ponca Tribe of Indians of Oklahoma11
- Ponca Tribe of Nation1
- Potawatomi Tribe11
- Quapaw Nation7
- Sac and Fox Nation1
- Seminole Nation9
