Sir Donald Collin Cumyn Luddington, KBE CMG CVO (Chinese: 陸鼎堂爵士, 18 August 1920 – 26 January 2009) was a British colonial government official and civil servant who served firstly in the Hong Kong Government and became District Commissioner, New Territories and the Secretary for Home Affairs successively, during which he had also served as an official member of the Legislative Council.

[1] His father, Norman John Luddington, was a civil servant in British Ceylon and his mother was Myrtle Amethyst Payne.

He was initially commissioned as a second lieutenant in the King's Own Yorkshire Light Infantry (KOYLI) on 28 December 1940,[3] and transferred to the Royal Armoured Corps (RAC) on 22 October 1941.

[2][5][6] By that time he was a lieutenant, he continued to hold his emergency commission until 19 July 1952 when he transferred to the Reserve of Officers, and was granted the honorary rank of captain.

In April 1969, Luddington replaced Kenneth Strathmore Kinghorn as District Commissioner, New Territories, thus becoming an official member of the Legislative Council appointed by then Governor Sir David Trench under the approval from the Queen.

[12] However, as Rafael Hui, a former junior colleague to Luddington recalled, he was too upright, and therefore, was not on very good terms with the diplomat-turned-new-governor, Sir Murray MacLehose.

[16][17][18][19] During his term as governor, he entertained Queen Elizabeth II and Prince Philip in their royal visit to the Solomon Islands in February 1974.

Luddington was appointed Knight Commander of the Order of the British Empire in the Queen's Birthday Honours in June 1976 for his services to Oceania.

[23] He left the post in March 1978 but was appointed to replace Jack Cater as the second Commissioner of ICAC by Governor MacLehose on 4 July in the same year.