Union Bank, N.A., formerly known as Union Bank of California, N.A., is a full-service commercial bank with 398 retail branches in California, Washington and Oregon. On June 30, 2012, the bank was also operating commercial branches in Dallas, Houston, New York City and Chicago, as well as two international offices. Headquartered in San Francisco, Union Bank is a subsidiary of UnionBanCal Corporation, a financial holding company.