Contact Us

Phone Numbers:

Office Number (707) 557-8900
Toll Free (888) 600-0550
Fax Number (707) 359-4290
Befit Audio Response Access (707) 557-8900, Press 1
VISA Credit Card Assistance (866) 291-2640
VISA Check Card Assistance (800) 554-8969
VISA Check Card Activation (800) 708-7119
Bill Payer (855) 855-0734

Main Branch Address:

640 East Main Street
Vacaville, CA 95688

Vallejo Branch Address:

145 Valle Vista Ave Suite G
Vallejo, CA 94590

Branch Hours of Operation:

Monday – Friday: 10:00am to 5:00pm
Saturday & Saturday: Closed

Mailing Address:

PO Box 5760
Vacaville, CA 95696

Fax Number:

(707) 359-4290

Loan Department Fax Number:

(707) 359-4515

Email: or use our Contact Us Form

2019 Holiday Schedule:

Martin Luther King, Jr. Day Monday, January 21 Closed
President's Day Monday, February 18 Closed
Memorial Day Monday, May 27 Closed
Independence Day Thursday, July 4 Closed
Labor Day Monday, September 2 Closed
Columbus Day Monday, October 14 Closed
Veteran's Day Monday, November 11 Closed
Thanksgiving Day Thursday, November 28 Closed
Day after Thanksgiving Friday, November 29 Closed
Christmas Eve Tuesday, December 24 Closed at 2:00pm
Christmas Day Wednesday, December 25 Closed
New Year's Eve Tuesday, December 31 Closed at 2:00pm
New Year's Day Wednesday, January 1, 2020 Closed

ATM Locations:


  • 975 Sereno Drive, Vallejo, CA 94589 (Kaiser Medical Office Building)
  • 975 Sereno Drive, Vallejo, CA 94589 (Kaiser Hospital Building)


  • 640 East Main Street, Vacaville, CA 95688 (Deposit Taking)
  • 1 Quality Dr, Vacaville, CA 95688 (Kaiser Hospital Building)


  • 901 Nevin Avenue, Richmond, CA 94801 (Kaiser Medical Office Building)

With the CO-OP Network you have access to nearly 30,000 surcharge-free ATMs.  Please click on the link below to find out the ATM nearest you.

co op network
Locate a CO-OP ATM Online

Contact Us Form

Do not use this form to send any sensitive information (account number, passwords, etc.)