Sir Donald Collin Cumyn Luddington, (Chinese: ?????, 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.
He was later promoted to Oceania and was High Commissioner for the Western Pacific and Governor of the Solomon Islands during the period from 1973 to 1976.
He returned to Hong Kong in 1977 to replace Sir Ronald Holmes as chairman of the Public Service Commission.
He was the second person, after Sir Jack Cater, to hold the post of Commissioner of ICAC from 1978 until his retirement in 1980.