The Bank of Ireland (Irish: Banc na hÉireann) (ISEQ: BKIR, LSE: BKIR, NYSE: IRE) is a commercial bank operation in Ireland, which is one of the traditional 'Big Four' Irish banks.

Bank of Ireland is regulated by the Central Bank of Ireland. In the UK, Bank of Ireland is authorised by the Central Bank of Ireland and the Prudential Regulation Authority and subject to limited regulation by the Financial Conduct Authority and Prudential Regulation Authority.