Henry Manvers Pierrepont (18 March 1780 – 10 November 1851) was an English diplomat.
Pierrepont was the third son of Charles Pierrepont, 1st Earl Manvers, by Anne, daughter of William Mills, of Richmond, Surrey.
Their daughter Augusta Sophia Anne Pierrepont married Major-General Lord Charles Wellesley.
Through her, Pierrepont is the maternal grandfather of Henry Wellesley, 3rd Duke of Wellington and Arthur Wellesley, 4th Duke of Wellington.
[1] His memorial is in St. Edmund's Church, Holme Pierrepont.