| Sir Henry Augustus Smyth | |
| Birth Date: | 1825 11, df=yes |
| Birth Place: | St James's Street, London |
| Death Place: | Stone, Buckinghamshire |
| Placeofburial: | Stone, Buckinghamshire |
| Branch: | British Army |
| Serviceyears: | 1841 - 1893 |
| Rank: | General |
| Unit: | Royal Artillery |
| Battles: | Crimean War |
| Awards: | Knight Commander of the Order of St Michael and St George |
General Sir Henry Augustus Smyth (25 November 1825 – 19 September 1906) was a senior British Army officer. He was the son of Admiral William Henry Smyth and the brother of astronomer Charles Piazzi Smyth and geologist Sir Warington Wilkinson Smyth. Of his sisters, Henrietta married the theologian Baden Powell and Georgiana the anatomist Sir William Henry Flower.
Born on 25 November 1825 in Westminster and educated at Bedford School, Smyth was commissioned as second lieutenant in the Royal Artillery in 1843. He served in the Crimean War and was present at the Siege of Sevastopol. He became commandant of Woolwich garrison and military district in 1882 and General Officer Commanding the troops in South Africa in 1886. In 1888 Smyth mustered an army of 2,000 troops and left for Zululand to put down a rebellion there.[1]
Smyth became acting Governor of Cape Colony as well as acting High Commissioner for Southern Africa in 1889. He became Governor of Malta in 1890 before retiring in 1893.
On 14 April 1874 at Lillington, Warwickshire, he married Helen Constance Greaves (1845–1932), daughter of John Whitehead Greaves and sister of John Ernest Greaves. They had no children. Smyth died on 18 September 1906 at Stone, Buckinghamshire, and was buried there.