Sir Herbert Frederick Cook, 3rd Baronet Cook of Richmond (18 November 1868 – 4 May 1939) was an English art patron and art historian.
Only son of Sir Frederick Cook, he was educated at Harrow School and Balliol College, Oxford and called to the Bar by the Inner Temple in 1895. He married in 1898 to the Hon Mary Hood, daughter of the 2nd Viscount Bridport, with whom he had one son (Francis, who succeeded him) and two daughters.
In 1920 he succeeded to his father's baronetcy, along with the first baronet's art collection. Though he was not a major collector himself, he did add Rembrandt’s Portrait of a boy (Norton Simon Foundation) and Titian’s Portrait of a lady (National Gallery, London). He housed the collection at Doughty House and was a co-founder of The Art Fund, the Burlington Magazine and the Arundel Club. He served on committees for foreign exhibitions and organised several in London. In 1930 he also gave £1000 to the University of London for the Courtauld Institute of Art.