Admiral Theobald Jones (15 April 1790 – 7 February 1868), also known as Toby Jones,was an Irish officer in the British Royal Navy, a Tory politician, a noted lichenologist, and a fossil-collector. The County Londonderry-born son of a Church of Ireland clergyman, Jones was descended from a 17th-century Welsh settler in Ireland. Several generations of his family had held public office in the Kingdom of Ireland, including membership of the pre-union Parliament of Ireland.