Peerage of Ireland

The peerage of Ireland consists of those titles of nobility created by the English monarchs in their capacity as Lord or King of Ireland, or later by monarchs of the United Kingdom of Great Britain and Ireland. Originally an element in the constitution of Ireland, with peers holding seats in the Irish House of Lords, it is now seen as one of the peerages in the United Kingdom. The creation of such titles came to an end in the 19th century.

The ranks of the Irish peerage are duke, marquess, earl, viscount, and baron. As of 2016, there were 135 extant peerages in the peerage of Ireland: two dukedoms, ten marquessates, 43 earldoms, 28 viscountcies, and 52 baronies.

The United Kingdom now includes only part of the island of Ireland, namely Northern Ireland, and Irish titles are not officially recognised by the Republic of Ireland, with Article 40.2 of the Constitution of Ireland forbidding the state conferring titles of nobility and stating that an Irish citizen may not accept titles of nobility or honour except with the prior approval of the Irish government.

In the following table, each peer is listed only by his highest Irish title, showing higher or equal titles in the other peerages. Those peers who are known by a higher title in one of the other peerages are listed in italics.