National College of Ireland (NCI) or Coláiste Náisiúnta na hÉireann (CNÉ) in Irish is a not-for-profit, state-aided third-level education institution in Dublin. It was founded in 1951 as a joint venture between Irish Jesuits and Irish Trade Unions and originally named the Catholic Workers College, Dublin. It is now an autonomous college, offering full and part-time courses from undergraduate to postgraduate level, in areas related to, among others, psychology, finance, business and computing. The courses are delivered from the IFSC campus in Dublin and across a network of regional centres.

NCI's specialist areas include psychology, human resource management, data analytics, management, cloud computing, fintech, accountancy, cybersecurity, education, and finance. NCI is also known for its free public events which include the dot conf digital and web technology conference, the Legends in Your Lunchtime series, the Seven Deadly Skills, In the Psychologists' Chair and Marketing Mavericks.

In 1951, the National College of Ireland started out as the Catholic Workers College, Dublin in Sandford Lodge, Ranelagh. Founded by Fr. Edward Coyne S.J., in association with Trade Unionists such as Walter Beirne others involved in the college in its initial years included Professor Thomas A. Finlay S.J., and Rev. Edmund Kent S.J. among others.

Lectures were led by a handful of dedicated Jesuits two nights a week, with 103 registered students in the first year. Within 10 years, student numbers had dramatically increased. Links with trade unions deepened, as did formal collaborations with employer and management groups.