Lieutenant-General Sir Hercules Robert Pakenham KCB (29 September 1781 – 7 March 1850) was a British Army officer who served as aide-de-camp to William IV of the United Kingdom.

[2][3] He was promoted to a majority in the 7th West India Regiment 30 August 1810, remained with the Peninsular Army, and was assistant adjutant-general of Picton's division up to the fall of Badajos, where he was severely wounded and received the Gold Cross for Busaco, Fuentes d'Onoro, Ciudad Rodrigo and Badajos.

[2][3] He succeeded Sir Thomas McMahon as Lieutenant-Governor of Portsmouth and General Officer Commanding South-West District in 1839,[5] was appointed colonel 43rd Light Infantry on 9 September 1844, and was promoted to lieutenant-general on 9 November 1846.

[3][6] Pakenham won the 1826 general election for Westmeath, but did not accept due to rumors that his favoring of Protestant interests resulted in his brother "discarding" him.

He is a very pleasant young man; I wish he had been here when you were, that your recollection of Baron’s Court might have been more lively.On 25 December 1817, Pakenham married the Hon.

Together, they were the parents of six sons and three daughters, including:[2][3] He died suddenly at his residence, Langford Lodge,[nb 1] County Antrim, on 7 March 1850.