James Bucknall Grimston, 3rd Viscount Grimston was a British peer, born the heir to his Irish peerage, and Member of Parliament whose service in Parliament for seven years led to his, and his male descendants', ennoblement into the Peerage of Great Britain.
- Occupation
- politician
- Position held
- member of the 15th Parliament of Great Britain, member of the 16th Parliament of Great Britain
- Born
- May 9, 1747
- Died
- December 30, 1808
