Union Bank Search | Advanced Search | New Members | Coupons and Discounts | All Categories Finance & Insurance >> Banks Union Bank 995 Higuera St.San Luis Obispo, CA 93401 | map | directions (805) 543-6321 | fax: (805) 543-1556 Visit Site Full-service bank. Member Since: 1987 If your business isn't here, contact us today to get listed!