Thomas Pitt Hamilton Cholmondeley, 4th Baron Delamere (/ˈtʃʌmli/; 19 August 1900– 13 April 1979), styled The Honourable Thomas Cholmondeley from birth until 1931, was a British peer. Popularly known (from 1931) as Tom Delamere, he lived on and owned the vast estate known as Soysambu Ranch in Kenya.
Cholmondeley was the eldest son of The 3rd Baron Delamere, whom he succeeded in 1931. His mother was Lady Florence Anne Cole, an Anglo-Irish who was the daughter of The 4th Earl of Enniskillen. Cholmondeley was an indirect descendant of Sir Robert Walpole, the first Prime Minister of Great Britain. He was educated at Eton.
In this period, the Cholmondeley family continued to own ancestral land and estates in Cheshire in the North of England. However, Lord Delamere lived, worked and invested most of his life in building modern Kenya. In 1934, Tom Delamere moved his family into Vale Royal Abbey, only to be forced out in 1939 when His Majesty's Government converted Vale Royal to serve as a sanatorium for soldiers of World War II. The Cholmondeleys were restored to possession of the abbey after the war, but by 1947 the house and grounds had been sold.
Cholmondeley married on 14 June 1924, Phyllis Anne (1904-1978), daughter of Lord George William Montagu Douglas Scott (1866–1947; younger son of The 6th Duke of Buccleuch) and Lady Elizabeth Emily Manners (1878–1924; daughter of The 7th Duke of Rutland). The children of that marriage were: