Finding the Nearest Branch and ATM made simple!
Whether you are across town or traveling far from home, you are welcome at any of our seven convenient branches in South Dakota and at any of the 5,600 CO-OP Shared Branch locations and the 250 Xtend Shared Branch locations nationwide.
Effortlessly locate the closest ATM or branch with Sentinel Federal Credit Union’s user-friendly locator tool. Enjoy seamless access to your account, make transactions, and get the support you need with ease. Stay connected and manage your banking needs with confidence, thanks to our convenient locator feature.
Street Address
22752 Mule Deer Trail
Box Elder SD 57719Mailing Address
PO Box 700
Box Elder SD 57719Drive-Up ATMs
447 North Ellsworth Road
Box Elder, SD 5771922752 Mule Deer Trail
Box Elder, SD 57719Contact Us
Main Phone: 605-923-1405
Toll-Free: 888-923-1400
Fax: 605-923-3960Call Center Hours
Mon – Fri 7:30 am – 5:30 pm MTLobby Hours
Mon – Fri 9:00 am – 4:30 pm MTDrive-Up Hours
Mon – Fri 8:30 am – 4:30 pm MT
Street Address
18 Mount Rushmore Road
Custer, SD 57730Mailing Address
PO Box 700
Box Elder SD 57719Drive-Up ATM Available
Contact Us
Main Phone: 605-923-1405
Toll-Free: 888-923-1400
Fax: 605-923-3960Call Center Hours
Mon – Fri 7:30 am – 5:30 pm MTLobby Hours
Mon – Fri 9:00 am – 5:00 pm MTDrive-Up Hours
Mon – Thurs 8:00 am – 5:00 pm MT
Friday 8:00 am – 5:30 pm MT
Street Address
2723 Lemay Blvd
Ellsworth AFB, SD 57706Mailing Address
PO Box 700
Box Elder SD 57719Drive-Up ATM
2723 Lemay Blvd
Ellsworth AFB, SD 57706Walk-Up ATM
2932 Arnold Dr
Ellsworth AFB, SD 57706Contact Us
Main Phone: 605-923-1405
Toll-Free: 888-923-1400
Fax: 605-923-3960DSN: 675-6303
Call Center Hours
Mon – Fri 7:30 am – 5:30 pm MTLobby Hours
Mon – Fri 9:00 am – 5:00 pm MT
Street Address
553 E. Main Street
Hill City, SD 57745Mailing Address
PO Box 240
Hill City, SD 57745Contact Us
Main Phone: 605-923-1405
Toll-Free: 888-923-1400
Fax: 605-923-3960Call Center Hours
Mon – Fri 7:30 am – 5:30 pm MTLobby Hours
Mon – Fri 8:00 am – 5:00 pm MT
Saturday 9:00 am – Noon MT
Street Address
1430 Haines Ave Ste 101
Rapid City, SD 57701Mailing Address
PO Box 700
Box Elder SD 57719Drive-Up ATM Available
Contact Us
Main Phone: 605-923-1405
Toll-Free: 888-923-1400
Fax: 605-923-3960Call Center Hours
Mon – Fri 7:30 am – 5:30 pm MTLobby Hours
Mon – Fri 9:00 am – 5:00 pm MTDrive-Up Hours
Mon – Fri 7:30 am – 5:30 pm MTSaturday 9:00 am – Noon MT
Street Address
4011 Triple Crown Dr
Rapid City, SD 57701Mailing Address
PO Box 700
Box Elder SD 57719Drive-Up ATM Available
Contact Us
Main Phone: 605-923-1405
Toll-Free: 888-923-1400
Fax: 605-923-3960Call Center Hours
Mon – Fri 7:30 am – 5:30 pm MTLobby Hours
Mon – Fri 9:00 am – 5:00 pm MTDrive-Up Hours
Mon – Thurs 8:00 am – 5:00 pm MT
Friday 8:00 am – 5:30 pm MT
Saturday 9:00 am – Noon MT
Street Address
511 E 2nd St
Winner, SD 57580Mailing Address
511 E 2nd St
Winner, SD 57580Drive-Up ATM Available
Contact Us
Phone: 605-842-3581
Toll-Free: 888-923-1400
Fax: 605-923-3960Call Center Hours
Mon – Fri 7:30 am – 5:30 pm MTLobby Hours
Mon – Fri 8:30 am – 3:30 pm CTDrive-Up Hours
Mon – Fri 8:00 am – 3:30 pm CT
CO-OP ATM & Shared Branch Locator
From coast to coast, you’re welcome at branches and ATMs wherever you see the CO-OP logos. That covers a lot of territory — whether you’re across town or traveling far from home for business or pleasure. Your credit union membership means you can:
- Use nearly 30,000 surcharge-free* ATM locations — more than some of the biggest banks offer
- Take advantage of surcharge-free ATMs at convenient places like 7-Eleven® and Costco®
- Visit over 5,600 convenient Shared Branch locations covering all 50 states – simply have your credit union name, account number, and a government ID and you’ll have access to your accounts
- Easily locate ATMs and branches through any of our locator tools — including phone, mobile app or Internet
Find a CO-OP Shared Branch or surcharge-free ATM right now at www.allco-op.org or call 1-888-SITE-CO-OP.*
*There are no surcharge fees at ATMs that we own and at ATMs that display the CO‑OP logo. Per our Common Features (Fee Schedule) there is a $1.25 fee per ATM withdrawal/transfer at ATMs we do not own and a $.50 fee per Account Balance Inquiry.
Xtend Shared Branch Locator
At over 250 Xtend Shared Branches nationwide, you can get convenient access to your Credit Union accounts and make transactions.
- Withdrawals
- Deposits
- Loan payments
- Transfers
- Balance inquiries
For a complete list of locations and hours, visit search.xtendcu.com.
Download the Xtend Shared Branch App from the App Store and on Google Play.
