Baron Carrickfergus

Baron Carrickfergus is a title in the Peerage of the United Kingdom, referring to Carrickfergus in County Antrim, Northern Ireland. Its current holder, since its creation on 29 April 2011, is Prince William, Duke of Cambridge, who was granted the title as a personal gift, by Queen Elizabeth II, on the day of his marriage to Catherine Middleton. On the same day he was also created Duke of Cambridge and Earl of Strathearn, with his bride becoming Her Royal Highness The Duchess of Cambridge as well as Countess of Strathearn and Baroness Carrickfergus as a result of the marriage. Traditionally, when male members of the British royal family marry, they are granted at least one peerage.

A barony, referring to Carrickfergus, had previously existed between 1841 and 1883. In 1841, George Chichester, 3rd Marquess of Donegall, was created by Queen Victoria as Baron Ennishowen and Carrickfergus, of Ennishowen, in the County of Donegal, and Carrickfergus, in the County of Antrim, in the Peerage of the United Kingdom. When he died in 1883, the Barony of Ennishowen and Carrickfergus became extinct; the Marquessate of Donegall was inherited by his brother, Lord Edward Chichester.