This is a list of people who have served as Lord-Lieutenant of Longford. The office was created on 23 August 1831.
George Forbes, Viscount Forbes 7 October 1831 – 13 November 1836Luke White 22 November 1836 – 1841Henry White, 1st Baron Annaly 1841 – 3 September 1873Luke White, 2nd Baron Annaly 7 November 1873 – March 1874William Pakenham, 4th Earl of Longford 27 March 1874 – 19 April 1887Thomas Pakenham, 5th Earl of Longford 14 June 1887 – 21 August 1915vacantBernard Forbes, 8th Earl of Granard 26 August 1916 – 1922