Sir Denis Fitzgerald Desmond, KCVO, CBE (born 1943) is a retired British company director and public administrator, who was Lord Lieutenant of County Londonderry from 2000 to 2018. Desmond was born in 1943, the son of an army officer. He served as an officer in the Territorial Army from 1964 to 1969, for the two years as aide-de-camp to Governor of Northern Ireland. In 1970, he became chairman of , his family's clothing business; he stepped down as chairman in 2005. He also sat on the board of Ulster Bank in the 1990s and was council member for The Prince's Trust Northern Ireland between 2008 and 2012.