James Dennis, 1st Baron Tracton PC (1721–15 June 1782) was an Irish politician and judge.
He was the legal advisor to Henry Boyle, 1st Earl of Shannon, who also became a close personal friend.
The barony died with him,[1] but he left his estates to his two nephews, who in accordance with his will changed their surname to 'Dennis' and paid an annual jointure of £1,800 to their uncle's widow.
His nephews were the two sons of Thomas Swift (1711–1803), of Lynn, County Westmeath, who had married his only sister, Frances.
Lord Tracton left his estates in County Kerry to his first nephew, the Rev.