Sir Roy Allan McKenzie ONZ KBE (7 November 1922 – 1 September 2007) was a New Zealand horse breeder and racer, and was well known for his philanthropy.

[1] From 1955 he was the principal at the Roydon Lodge horse stud, and he bred, trained and raced many leading horses, including Roydon Glen, Sundon, Game Pride, Smooth Fella, Scottish Command, Jay Ar, Bonnie Frost, Captain Adios, Castleton's Pride and Garcon Roux.

McKenzie was also patron of the Outward Bound Trust, and a councillor at the Council for Educational Research.

[3] He also was a benefactor and founding patron of the Seabrook McKenzie Centre, which assists people with specific learning difficulties and their families.

[5] In the 1989 New Year Honours, McKenzie was appointed a Knight Commander of the Order of the British Empire, for services to education and the community.