Henry Augustus Brudenell-Bruce, 5th Marquess of Ailesbury (11 April 1842 – 10 March 1911), styled Lord Henry Brudenell-Bruce from 1878 to 1894, was a British soldier, businessman and Conservative politician.

Louisa Elizabeth, daughter of John Horsley-Beresford, 2nd Baron Decies.

[1] He served in the British Army and achieved the rank of captain in the 9th Regiment of Foot and lieutenant colonel in the 3rd Battalion of the Duke of Edinburgh's Wiltshire Regiment.

In 1894 he succeeded to the marquessate on the early death of his nephew and took his seat in the House of Lords.

[2] They had three children, Lady Ernestine Mary Alma Georgiana (6 September 1871 – 18 May 1953), George William James Chandos Brudenell-Bruce, 6th Marquess of Ailesbury (21 May 1873 – 4 August 1961), and Lady Violet Louisa Marjory (1 March 1880 – 26 August 1923).