General Sir Frederick Horn GCB (21 June 1805 – 1894) was a senior British Army officer who briefly commanded the 4th Division at the Battle of Inkerman during the Crimean War.

Horn was commissioned as an ensign in the 20th (East Devonshire) Regiment of Foot on 26 January 1826.

[2] He was deployed to Ireland in early 1841 and to Bermuda in November 1841: he was promoted to lieutenant-colonel and given command of the reserve battalion of his regiment in April 1846.

[3] He was present at the Siege of Sevastopol in winter 1854 and was given command of a brigade in the Highland Division in the Crimea in June 1855.

[2] Horn was promoted to major-general on 13 October 1860, to lieutenant-general on 18 January 1870 and to full general on 2 June 1877.