| Honorific-Prefix: | The Right Honourable |
| The Lord Ponsonby of Shulbrede | |
| Office: | Parliamentary Under-Secretary of State for Justice |
| Term Start: | 9 July 2024 |
| Primeminister: | Sir Keir Starmer |
| Predecessor: | The Lord Bellamy |
| Office1: | Member of the House of Lords |
| Status1: | Lord Temporal |
| Term Start1: | 19 April 2000 as a life peer |
| Term Start2: | 14 June 1990 |
| Term End2: | 11 November 1999 as a hereditary peer |
| Predecessor2: | The 3rd Baron Ponsonby of Shulbrede |
| Successor2: | Seat abolished |
| Birth Date: | 27 October 1958 |
| Party: | Labour |
| Relations: | Ponsonby family |
| Birth Name: | Frederick Matthew Thomas Ponsonby |
Frederick Matthew Thomas Ponsonby, 4th Baron Ponsonby of Shulbrede, Baron Ponsonby of Roehampton (born 27 October 1958), is a British peer and Labour Party politician.
Ponsonby was born on 27 October 1958 to Thomas Ponsonby, 3rd Baron Ponsonby of Shulbrede, and Ursula Fox-Pitt. He is married with two children: Eve (born 1991) and Cameron (born 1995).
As his father's eldest child, he succeeded him as Baron Ponsonby of Shulbrede and a hereditary peer upon his death in 1990. A member of the Labour Party, he lost his seat in the House of Lords after the passage of the House of Lords Act 1999. However, he returned to the chamber as a life peer in 2000, as Baron Ponsonby of Roehampton, of Shulbrede in the County of West Sussex. Ponsonby served as an opposition spokesperson for Justice from April 2020 and Home Affairs from May 2021.
On 9 July 2024, Ponsonby was appointed Parliamentary Under-Secretary of State for Justice in the Ministry of Justice and as a lord-in-waiting.[1]