We are committed to improving the quality of life for our members and the communities we serve across the East Bay and Tri-Valley areas. Branch & ATM Locations Locate a branch near you. With eight East Bay area branches to serve you, you’ll find a 1st United Credit Union conveniently located in your neighborhood including Alameda, Berkeley, Castro Valley, Fremont, Hayward, Oakland, Pleasanton, and San Leandro. It’s Easy to Join! Membership at First United Credit Union is forever. Whether you change jobs, retire, or move to a new city or state, when you maintain your accounts in.