Peter Wynford Innes Rees, Baron Rees PC QC (b December 9, 1926) was Conservative MP for Dover and Deal from 1970-1983 and MP for Dover from 1983-1987. He was Chief Secretary to the Treasury from 1983 until 1985, created Baron Rees in November 1987.

Rees was educated at Stowe and Christ Church, Oxford before becoming an MP in the 1970 UK general election. In 1979 he became Minister of State at the Treasury working to the Chancellor of the Exchequer, Geoffrey Howe, before becoming Minister for Trade in 1981. After the 1983 UK general election he was appointed to the cabinet as Chief Secretary to the Treasury, working to the new Chancellor of the Exchequer, Nigel Lawson.

Unlike most other Chief Secretaries to the Treasury, Peter Rees never went further within the Cabinet leaving the post in the September 1985 cabinet reshuffle. He gave up his seat at the 1987 UK general election and was made a life peer as Lord Rees soon afterwards where he remains as a Conservative.