Earl of Shrewsbury is a hereditary title of nobility created twice in the Peerage of England. The second earldom dates to 1442. The holder of the Earldom of Shrewsbury also holds the title of Earl of Waterford (1446) in the Peerage of Ireland and Earl Talbot (1784) in the Peerage of Great Britain. Shrewsbury and Waterford are the oldest earldoms in their peerages held by someone with no higher title, and as such the Earl of Shrewsbury is sometimes described as the premier earl of England and 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. 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.