A · Identity
S.16 GOVERNMENT
- Official name (Federal Register)
- Cheyenne River Sioux Tribe of the Cheyenne River Reservation, South Dakota 91 FR 4102 (Jan. 30, 2026)
- State(s)
- South Dakota
- BIA region
- Great Plains
- BIA agency office
- Cheyenne River Agency
- Headquarters
- 24 E. Street, Eagle Butte, South Dakota 57625
- Website
- cheyenneriversioux.com
B · Governance
- Election cycle
- Next election: 2026-11-06 (per BIA TLD)
- Current leadership
- Ryman LeBeau — Chairman
C · Charter & Corporate Entities
No chartered entities on record yet.
D · Economic Development Profile
No economic profile data on record yet.
E · History & Context
No narrative on record yet.
F · Validated Sourcing
Federal Register2026-07-18 BIA Tribal Leaders Directory2026-07-21
Record last verified 2026-07-18. Nothing enters this record without a source.
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