Harold Greenwood Henderson, CVO (29 October 1875 – 1 November 1922), was a British Conservative politician.

Born in Brentford, Henderson was the eldest son of Alexander Henderson, 1st Baron Faringdon of Buscot Park in Berkshire (now Oxfordshire), and his wife Jane Ellen (née Davis).

He was commissioned a second lieutenant in the 3rd (Militia) Battalion of the Royal Berkshire Regiment on 3 March 1894.

Henderson resigned his seat on his appointment as military secretary to the Duke of Devonshire who was to become Governor General of Canada in November 1916.

[7] He died in November 1922, aged 47 in Faringdon, twelve years before the death of his father.