| Honorific-Prefix: | The Right Honourable |
| The Viscount Simon | |
| Office1: | Member of the House of Lords |
| Status1: | Lord Temporal |
| Term Label1: | as a hereditary peer |
| Term Start1: | 19 May 1994 |
| Term End1: | 11 November 1999 |
| Predecessor1: | The 2nd Viscount Simon |
| Successor1: | Seat abolished |
| Term Label2: | as an elected hereditary peer |
| Term Start2: | 11 November 1999 |
| Term End2: | 15 August 2021 |
| Predecessor2: | Seat established |
| Successor2: | The 3rd Baron Hacking |
| Birth Name: | Jan David Simon |
| Birth Date: | 20 July 1940 |
| Nationality: | British |
| Party: | Labour |
| Children: | 1 |
Jan David Simon, 3rd Viscount Simon (20 July 1940 – 15 August 2021), was a British hereditary peer and member of the House of Lords.
Simon was born in 1940, the only son of John Simon, 2nd Viscount Simon, and his wife Christie Hunt. He was educated at Westminster School, at the School of Navigation, University of Southampton and at Sydney Technical College.
Simon succeeded to the viscountcy upon the death of his father in 1993 and became a member of the House of Lords. He was one of the ninety hereditary peers elected to remain in the House of Lords after the passing of the House of Lords Act 1999 and sat for the Labour Party.[1]
Lord Simon was President of the Driving Instructors Association from 2000, and of GEM Motoring Assist from 2004.
Simon was married to Mary Elizabeth Burns from 1969 until her death in 2020.[2] They had one daughter:[3]
Lord Simon died on 15 August 2021 at the age of 81.[4] As he had no sons and as there were no other surviving male line heirs of the first viscount, the viscountcy became extinct upon his death.