Major-General Sir William Eyre KCB (21 October 1805 – 18 September 1859) was an officer in the British Army.

[1][2] He served in Cape Frontier War of 1847 and was promoted to lieutenant-colonel the same year.

In 1852 he commanded the right wing in the punitive attack on Moshoeshoe I at Berea in Basutoland.

The same year he was appointed Companion of the Bath, served as aide-de-camp to Queen Victoria, and was promoted to colonel.

In 1854 he commanded the 3rd Brigade and later the 3rd Division in Crimean War and was promoted to major-general.