Sir Henry Carstairs Pelly, 3rd Baronet (24 April 1844 - 4 June 1877) was a Conservative Party politician.
Pelly was elected Conservative MP for Huntingdonshire in 1874, but died before completing a full parliamentary term in 1877.
Pelly succeeded to 3rd Baronet of Upton upon his father John Pelly's death on 20 December 1864.
Pelly married Lady Lilian Harriet Charteris, daughter of Francis Charteris, 10th Earl of Wemyss on 27 November 1872.
During his life, Pelly was a Justice of the Peace, a Deputy Lieutenant, and captain in the 2nd Regiment of Life Guards.