David Rees Rees-Williams, 1st Baron Ogmore, PC, TD (22 November 1903 – 30 August 1976) was a British politician.

He transferred to the Royal Artillery in 1940, when all searchlight units did so, and ended the Second World War as a Lieutenant-Colonel.

Rees-Williams was elected Labour Member of Parliament for Croydon South in 1945, defeating the incumbent MP, Sir Herbert Williams.

In the government he was a minister in the Colonial Office, travelling to East Asia to consider the movements towards independence.

[4] He served as Minister of Civil Aviation in 1951 and was made a Privy Councillor the same year.