St.George Bank is an Australian bank with its headquarters in Sydney. Since a 2008 merger, the bank has been part of Westpac, having previously been an independent legal entity. In 2010, St.George was deregistered as a company and ceased to be a standalone authorised deposit-taking institution.

The bank provides services primarily in New South Wales, but with growing representation across a number of industry and business segments in Queensland and Western Australia, and in Victoria before the relaunch of the Bank of Melbourne brand in July 2011 (also another division of Westpac). St.George also operates in South Australia and the Northern Territory under its subsidiary BankSA. The bank has a large number of retail branches and ATMs across Australia, and some back office operations in Bangalore, India.