United Credit UniontReviews (0)Write a Review Phone(800) 649-0193 Emailshow email Address 3365 Castro Valley Blvd Castro Valley, CA, 94546 Go to directory Show on a Map DescriptionCredit Union. CategoriesBusiness & Professional Services Social Mediatwitter.com Sitehttps://www.1stunitedcu.org/ false or inaccurate data? improve business info