Federal credit union, insured by the NCUA
Sentinel Federal Credit Union
Headquarters: Box Elder, SD
- Members
- 10,004
- Total assets
- $199.3 million
- Locations
- 8
- Insurance
- NCUA
All 8 locations
South Dakota 8
- Main2723 Lemay Blvd · Ellsworth Afb · Main office
- Radar Hill Branch22752 Mule Deer Trl · Box ElderHours as filed
- Liberty Branch441 N Ellsworth Rd · Box Elder
- Custer Office18 Mount Rushmore Rd · CusterHours as filed
- Hill CIty Office553 E Main St · Hill CityHours as filed
- Haines1430 Haines Ave Ste 101 · Rapid City
- Triple Crown4011 Triple Crown Dr · Rapid City
- Winner511 E 2nd St · Winner
Who can join
Insured by the NCUA up to $250,000 per member, per ownership category. Each credit union decides who can join, for example people who live or work in an area, belong to a group, or work for an employer. The NCUA file does not list those rules; the credit union website does.
Members and assets as reported to the NCUA for the quarter ending June 30, 2026.