NCUA-insured credit union
Sentinel
Credit Union headquartered in Box Elder, South Dakota.
Source: NCUA call report data, data as of March 31, 2026, fetched September 5, 2026
Headquarters and contact
| Address | Po Box 700 Box Elder, SD 57719 |
| County | Meade |
| Website | not published in NCUA data |
| Phone | (605) 923-1405 |
NCUA record
| NCUA Charter | 10257 |
| Federal Reserve RSSD ID | 727183 |
| Status | Active |
| Charter type | 1 (NCUA) |
| Financials as of | March 31, 2026 |
Routing number
NCUA does not publish ABA routing numbers, and many credit unions use different routing numbers by state or by account type. The reliable places to find yours: the bottom left of a check from this credit union, the "account details" screen in its online banking, or its official website.
See how your odds compare before you apply at Sentinel.
Offices
| Main main office Ellsworth AFB, SD |
2723 Lemay Blvd, 57706 (605) 923-1405 9 A.M - 5 P.M Mountain Time |
| Liberty Branch Box Elder, SD |
441 N Ellsworth Rd, 57719 (605) 923-1405 Lobby: M-F 9:00 AM-5:00 PM Drive Up: M-Thursday 8:00 AM-5:00 PM Drive Up: Friday 8:00 AM-5:30 PM Drive Up: Saturday 9:00 AM-12:00 PM |
| Radar Hill Branch Box Elder, SD |
22752 Mule Deer Trl, 57719 (605) 923-1405 |
| Custer Office Custer, SD |
18 Mount Rushmore Rd, 57730 (605) 673-4416 Monday thru Thursday 9:00a.m.-5:00p.m.Friday 8:00a.m. to 5:30p.m.Saturday 9:00a.m. to 12:00p.m. |
| Hill City Office Hill City, SD |
553 E Main St, 57745 (605) 574-9596 Monday thru Friday 8:00a.m. to 5:00p.m.Saturday 9:00a.m. to 12:00p.m. |
| Triple Crown Rapid City, SD |
4011 Triple Crown Dr, 57701 (605) 923-1405 9 A.M - 5 P.M Mountain Time |
| Haines Rapid City, SD |
1430 Haines Ave Ste 101, 57701 (605) 923-1405 9 A.M - 5 P.M Mountain Time |
| Winner Winner, SD |
511 E 2Nd St, 57580 (605) 842-3581 8 A.M - 4 P.M. Central Time |