Thomas Cholmondeley, 1st Baron Delamere (/ˈtʃʌmli/ CHUM-lee; 9 August 1767 – 30 October 1855), of Vale Royal, Cheshire, was a British landowner and politician.

[1] He was born on 9 August 1767 in Beckenham, Kent, the eldest son of Thomas Cholmondeley (1726–1779), Vale Royal, Cheshire and Dorothy Cowper.

[1] On 17 July 1821 he was raised to the peerage as Baron Delamere, of Vale Royal in the County Palatine of Chester.

[6] Hugh Cholmondeley, 5th Baron Delamere paints a picture of his early-19th-century ancestor with deft, harsh strokes: On 17 December 1810, Cholmondeley married Henrietta Elizabeth Williams-Wynn (d. 1852), daughter of Sir Watkin Williams-Wynn, 4th Baronet, and his wife, Charlotte (née Grenville).

[2] That union produced five children and numerous grandchildren:[2] The marriage of the baron's third son, Henry, produced nine grandchildren; and of these, Lionel would become chaplain to the British Embassy in Tokyo[10] and would write the first English-language history of the isolated Bonin Islands, including notes of changes which evolved after annexation by Meiji Japan in 1875.