Viscount Massereene is a title in the Peerage of Ireland. It was created in 1660, along with the subsidiary title of Baron Loughneagh. From 1665 to 1816 the Skeffington Baronetcy of Fisherwick was attached to the viscountcy and from 1756 to 1816 the Viscounts also held the title of Earl of Massereene. Since 1843 the peerages are united with titles of Viscount Ferrard, of Oriel and Baron Oriel, both in the Peerage of Ireland, and Baron Oriel, in the Peerage of the United Kingdom. The Viscount also holds the subsidiary titles of Baron Loughneagh (1660) and Baron Oriel (1790) in the Peerage of Ireland and Baron Oriel (1821) in the Peerage of the United Kingdom. As Baron Oriel, he sat in the House of Lords until 1999.

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.