Baron Stuart de Decies, of Dromana within the Decies in the County of Waterford, was a title in the Peerage of the United Kingdom. It was created on 10 May 1839 for Henry Villiers-Stuart, Member of Parliament for County Waterford and Banbury and Lord-Lieutenant of County Waterford. He was the eldest son of Lord Henry Crichton-Stuart, third son of John Stuart, 1st Marquess of Bute. His mother was Lady Gertrude Emilia, daughter of George Mason-Villiers, 2nd Earl Grandison. There was uncertainty over the validity of his marriage and his son Henry Villiers-Stuart was not allowed to succeed in the title, which became extinct on his death in 1874.