The growing influence of the Gaelic League at the turn of the twentieth century rekindled an interest in Gaelic culture and prompted the current cultural revival. The first modern Irish Clans were formed in the  latter  half of the twentieth century, and today they function as special interest groups which actively safeguard our cultural heritage and traditions.

Irish Clans are somewhat similar to Genealogical Societies or One Name Societies - but with an additional social dimension which is unique.

Rory O'Connor, the elected Chieftain of the O'Connor (Kerry) Clan, gave an undertaking in August 1987 that he "would work to have organised, all the Clans of Ireland, at home and abroad, into one great Family Association". In 1989, with financial assistance from Bord Fáilte and with the use of an office and facilities in the Genealogical Office, he successfully established Clans of Ireland, to promote world-wide interest in Irish origins, heritage and culture.

In 1990, Clans of Ireland was incorporated as a limited company. Clans of Ireland Ltd. provides guidance in establishing and maintaining a successful Clan society and co-ordinates the activities of the Irish Clans.

In recognition of the special role which Irish Clans play within the national cultural revival, Clans of Ireland Ltd. has been accredited as a Registered Charity (CHY 11585), and all registered Irish Clans are automatically eligible to apply for Charitable Status.