Henry Edmund Butler, 14th Viscount Mountgarret (18 December 1844 – 2 October 1912), was a British aristocrat.
Henry Butler was the son of Henry Edmund Butler, 13th Viscount Mountgarret and inherited the viscountcy on his death in 1900.
He inherited Nidd Hall from his great-aunt Elizabeth Rawson in 1890.
In 1911 he was created Baron Mountgarret, of Nidd Hall in the West Riding of the County of York, in the Peerage of the United Kingdom, thus enabling him and his descendants to sit in the House of Lords until the passage of the House of Lords Act 1999.
They had four children: Mountgarret married secondly, at All Saints´Church, Margaret Street, London, on 5 February 1902, Robinia Hanning-Lee, daughter of Colonel Hanning-Lee, commander of the 2nd Life Guards.