United Commercial Bank (UCB) is an overseas Chinese bank in the United States, based in San Francisco, CA. It is a subsidiary of UCBH Holdings. Founded in 1974 as United Federal Savings and Loan Association, it changed its name to United Savings Bank, and finally United Commercial Bank in 1998. It has operations and branches located in the San Francisco Bay Area, Sacramento, Stockton, Los Angeles and Orange Counties, New York, Boston, Greater Seattle Area, Hong Kong, Atlanta, Houston, Shanghai and two representative branches in Taipei, Taiwan and Shenzhen, China.

On January 11, 2007, UCBH announced that it was acquiring The Chinese American Bank with branch locations in Manhattan, New York and Flushing, New York. The deal is expected to close in the second quarter of 2007. On March 27, 2007, it was announced that UCBH would acquire Business Development Bank.