Ulster Bank of Ireland ( Ulster Bank is a large commercial bank and one of the four traditional Irish banks, founded in 1836 and headquartered in Dublin. Ulster Bank was acquired by Westminster Bank in 1917 and later became part of the Royal Bank of Scotland Group in 2000.

Ulster Bank has 146 branches in the Republic of Ireland, with a presence in Northern Ireland. 146 branches in the Republic of Ireland, 90 branches in Northern Ireland and over 1,200 ATMs, and the bank is one of four banks in Northern Ireland that can issue sterling currency. As of 2013, the bank had 3,250 employees and 1.9 million customers.