Sir Simon Alexander Bowes-Lyon KCVO (born 17 June 1932) is a first cousin of Queen Elizabeth II and was Lord Lieutenant of Hertfordshire from 1986 to 2007. He was created a Knight Commander of the Royal Victorian Order in The Queen's Birthday Honours List 2005.
He was born in 1932, the son of Sir David Bowes-Lyon, who also served as Lord-Lieutenant of Hertfordshire. On 11 April 1966, he married Caroline Mary Victoria Pike (b. 27 September 1940) and they have four children; Rosemary (b. 1968), Fergus (b. 1970), David (b. 1973), and Andrew (b. 1979).