Earl of Kingston is a title in the Peerage of Ireland. It was created in 1768 for Edward King, 1st Viscount Kingston. The Earl holds the subsidiary titles Baron Kingston, of Rockingham in the County of Roscommon, Viscount Kingston, of Kingsborough in the County of Sligo, Baron Erris, of Boyle in the County of Roscommon, and Viscount Lorton, of Boyle in the County of Roscommon, also in the Peerage of Ireland. He is also a baronet in the Baronetage of Ireland. Between 1821 and 1869 the earls also held the title Baron Kingston, of Mitchelstown in the County of Cork, in the Peerage of the United Kingdom.

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. It is one of the five divisions of 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 titles in the Peerage of Ireland extant: two dukedoms, ten marquessates, 43 earldoms, 28 viscountcies, and 52 baronies. However, these titles have no official recognition in 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.