| Honorific Prefix: | Sir |
| Henry Vassall Webster | |
| Honorific Suffix: | KTS |
| Birth Date: | February 1793 |
| Birth Place: | Naples |
| Death Date: | 19 April 1847 |
| Death Place: | Upper Brook Street, London |
| Placeofburial: | Kensal Green Cemetery |
| Allegiance: | United Kingdom |
| Branch: | British Army |
| Serviceyears: | 1810–1826 |
| Rank: | Lieutenant-colonel |
| Unit: | 9th Light Dragoons |
| Battles: | |
| Awards: | Knight of the Military Order of Wilhelm (1815) Knight Commander of the Military Order of the Tower and the Sword (1832) Military Order of Aviz (1835) Knight bachelor (1843) Waterloo Medal |
| Relations: | Sir Godfrey Webster, 4th Baronet (father) Elizabeth Fox, Baroness Holland (mother) Samuel Boddington (father-in-law) |
Lieutenant-Colonel Sir Henry Vassall Webster KTS (February 1793 – 19 April 1847) was a British Army officer. He served as an aide-de-camp to the Prince of Orange at the Battle of Waterloo.
He was the second son of Sir Godfrey Webster, 4th Baronet and his wife Elizabeth Vassall (later Baroness Holland).[1]
He joined the Army in 1810 and rose to lieutenant-colonel in 1831. In 1843, he was knighted.
Webster married Grace (d. 27 March 1866), the only daughter and heir of Samuel Boddington, on 23 October 1824.
He died on 19 April 1847 from self-inflicted knife wounds. He is buried at Kensal Green Cemetery.[2]
His portrait was painted by Martin Archer Shee.[3]