| Honorific Prefix: | Sir |
| Simon Bowes-Lyon | |
| Honorific Suffix: | KCVO |
| Birth Date: | 17 June 1932 |
| Children: | 4 |
| Parents: | David Bowes-Lyon Rachel Spender-Clay |
| Office: | High Sheriff of Hertfordshire |
| Term Start: | 1975 |
| Term End: | 1975 |
| Primeminister: | Harold Wilson |
| Predecessor: | Thomas Edward, Baron Dimsdale |
| Successor: | Peter Compton Hamilton-Spencer-Smith |
| Office2: | Lord Lieutenant of Hertfordshire |
| Term Start2: | 1986 |
| Term End2: | 2007 |
| Monarch2: | Elizabeth II |
| Primeminister2: | Margaret Thatcher John Major Tony Blair |
| Predecessor2: | Sir George Burns |
| Successor2: | The Countess of Verulam |
Sir Simon Alexander Bowes-Lyon (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.[1]
He was born in 1932, the son of Sir David Bowes-Lyon (1902–1961), who also served as Lord Lieutenant of Hertfordshire, and Rachel Pauline Spender-Clay (1907–1996), younger daughter of Herbert Spender-Clay. Through his father, he is a member of the Bowes-Lyon family, and through his mother, the Astor family.
On 11 April 1966, he married Caroline Mary Victoria Pike (b. 1940), daughter of Rt. Rev. Victor Joseph Pike, and they have four children:
Sir Simon Bowes-Lyon currently resides in St Paul's Walden Bury.[2]