| Honorific-Prefix: | The Right Honourable |
| Frederick Willey | |
| Office: | Chair of the Parliamentary Labour Party |
| Leader: | James Callaghan Michael Foot |
| Term Start: | 14 June 1979 |
| Term End: | 19 November 1981 |
| Predecessor: | Cledwyn Hughes |
| Successor: | Jack Dormand |
| Office1: | Minister of State for Housing and Local Government |
| Monarch1: | Elizabeth II |
| Primeminister1: | Harold Wilson |
| Term Start1: | 18 October 1964 |
| Term End1: | 19 June 1970 |
| Successor1: | Graham Page |
| Office2: | Parliamentary Secretary to the Minister of Food |
| Leader2: | Clement Attlee |
| Term Start2: | 18 April 1950 |
| Term End2: | 26 October 1951 |
| Predecessor2: | Stanley Evans |
| Successor2: | Charles Hill |
| Constituency Mp5: | Sunderland North Sunderland (1945-1950) |
| Term Start5: | 5 July 1945 |
| Term End5: | 13 May 1983 |
| Predecessor5: | Stephen Furness |
| Successor5: | Bob Clay |
| Birth Date: | 13 November 1910 |
| Nationality: | British |
| Party: | Labour |
| Spouse: | Eleanor Snowdon |
| Alma Mater: | St John's College, Cambridge |
Frederick Thomas Willey (13 November 1910 – 13 December 1987) was a British Labour Party politician. He was a Member of Parliament (MP) representing a Sunderland constituency for 38 years, from 1945 to 1983.
Willey was educated at Durham Johnston School and St John's College, Cambridge, where he graduated with a first-class degree in law and won the Blackstone Prize and a Harmsworth studentship. He was called to the Bar at the Middle Temple in 1936, and later worked as a barrister on the Northern Circuit.
His political career as an activist for social justice and other left-wing causes began in the 1930s, when he was the keynote speaker welcoming returning International Brigade volunteers to Sunderland.
During the Second World War Willey served with the Auxiliary Fire Service (AFS) and was an officer of the Fire Brigades Union.
Willey was elected to the House of Commons as Member of Parliament (MP) for Sunderland in 1945, when the Borough still sent two MPs to Parliament. In 1950 two-member constituencies were abolished and Willey was returned for the new constituency of Sunderland North, where he served until he retired before the general election of 1983.
Willey served as Parliamentary Secretary to the Ministry of Food from 1950 to 1951, and as Minister of Land and Natural Resources from 1965 to 1967. He opened the UK's first long-distance footpath, the Pennine Way, in 1965.
He served as Chairman of the Parliamentary Labour Party from 1979 to 1981.