Major-General William Craig Emilius Napier (18 March 1818 – 23 September 1903) was a British Army officer who became Governor of the Royal Military College, Sandhurst.

Born the son of Lieutenant-General Sir George Thomas Napier and educated at Cheltenham College,[1] William Napier served with the Buffs (Royal East Kent Regiment), and subsequently with the King's Own Scottish Borderers.

[1] He was Director-General of Military Education and fought at the recapture of Port Natal in 1842, in the Scinde Campaign in 1845 and in the Crimean War in 1855.

[3] He was given the colonelcy of the Buffs (Royal East Kent Regiment) from 1874 to 1882[4] and of the King's Own Scottish Borderers from 1882 to his death.

In 1845 he had married his cousin, Emily Cephalonia Napier, daughter of Lieutenant-General Sir Charles James Napier; they had seven daughters and one son.