| Honorific-Prefix: | Sir |
| Donald Mackenzie-Kennedy | |
| Office3: | Governor of Nyasaland |
| Term Start3: | 20 March 1939 |
| Term End3: | 8 August 1942 |
| Predecessor3: | Harold Baxter Kittermaster |
| Office4: | Governor of Mauritius |
| Term Start4: | 5 July 1942 |
| Term End4: | 5 December 1948 |
| Predecessor4: | Bede Edmund Hugh Clifford |
| Successor4: | Hilary Rudolph Robert Blood |
| Nationality: | British |
| Birth Name: | Henry Charles Donald Cleaveland Mackenzie-Kennedy |
Sir Henry Charles Donald Cleaveland Mackenzie-Kennedy (1889 – 2 August 1965)[1] was a British colonial administrator who was Governor of Nyasaland between 1939 and 1942, and 25th Governor of Mauritius from 5 July 1942 to 5 December 1948.
In 1930, Mackenzie-Kennedy was Chief Secretary of Northern Rhodesia. He was urged to deny the Ndola Welfare Association permission to meet, since mine owners might react unfavorably to an organization such as this being led by civil servants. In June 1935, he wrote to Sir Stewart Gore-Browne urging him to stand for election in Broken Hill, to Northern Rhodesia's legislative council, saying "Your duty is clear."
Henry Charles Donald Cleaveland Mackenzie-Kennedy was the son of Maj.-Gen. Sir Edward Charles William Mackenzie-Kennedy K.B.E. C.B. and his wife Ethel née Fuller. His birth was registered in the Sep Q of 1889 at Hastings, Sussex. He married Mildred, daughter of Rev. J. G. Munday and his wife Edith née Chadwick, in 1919 in the Wandsworth registration district of London.