Baron Louth is a title in the Peerage of Ireland. It has been created twice.
The title was created firstly c. 1458 for Sir Thomas Bathe, later Chief Baron of the Irish Exchequer. Although he had at least one son, John Bathe of Ardee, the title seems to have become extinct soon after his death in 1478.
It was created secondly in 1541 for Sir Oliver Plunkett. His great-great-great-grandson, the seventh Baron, served as Lord Lieutenant of County Louth. However, he later supported King James II and was outlawed. His great-great-grandson, the eleventh Baron, managed to obtain a reversal of the outlawry and was restored to the title. As of 2019[update] the title is held by the latter's great-great-great-great-grandson, the seventeenth Baron, who succeeded his father in 2013.
Admiral Peter Warren was a female-line great-grandson of the fifth Baron.
Saint Oliver Plunkett was very distantly related to the Barons of Louth.
Not to be confused with the title of Earl of Louth.
The heir apparent is the present holder's son Hon. Matthew Oliver Plunkett (born 1982)
The heir apparent's heir, and the next in line, is his elder son Samuel Murray Plunkett (born 2012)[2]
The family seat was Louth Hall, near Ardee, County Louth.