Allied Irish Banks (abbreviation: AIB) is one of the four major commercial banks in Ireland. In December 2010, the Irish government held 99.8% of the shares of Allied Irish Banks. With the pace of its nationalization, Allied Irish Banks was also delisted from the London Stock Exchange, but its remaining small shares are still listed on the Irish Stock Exchange.

AIB's branches in the United Kingdom are "Allied Irish Bank (GB) " and in Northern Ireland are "Allied Irish Bank (NI) ". In addition, it also has banking operations in other countries such as the United States. In 2009, it accepted a government bailout of 3.50 billion euros together with Irish banks during the economic crisis. By 2011, it had increased to 13.30 billion euros.

Company type State owned ISINIE00BYSZ9G33 Established 1966 Representative David Hodgkinson (Chairperson) Bernard Byrne (CEO) Headquarters, Dublin, Ireland Industry Finance, financial service activities, except insurance and pension funding Products Banking Industry EBIT ▲ 68 million Euros (2011) Net profit ▲ 2.30 billion Euros (2011) Owner Government of Ireland, number of employees 11,431 (2013) Website www.aib.ie