McKay was born in 1908 in Waipu.[1] He received his education from Whangārei Boys' High School and the University of Auckland. At Whangārei Boys' High School he was head prefect, captain of the first XI cricket team and captain of the first XV rugby team. Another student at the same school was future parliamentary colleague Jack Marshall who described McKay as his schoolboy hero.[2] He then became a farmer in Waipu.[1] He married Miriam Hilda Stehr in 1934 with whom he had 3 children.[citation needed]
McKay joined the National Party and became the chairman of the Marsden electorate committee. In early 1954 the 77 year-old MP for MarsdenAlfred Murdoch was challenged for the National nomination by William Rodney Lewin Vallance, the deputy mayor of Whangarei. Vallance won a postal ballot of members, an outcome which split the Marsden National Party membership into two opposing factions. After it emerged that Vallance was in trouble with his taxes he was in turn deselected and replaced by McKay. Vallance ran as an independent candidate and split the vote, almost costing National the seat.[3]
Following National's victory in 1960, Deputy Prime Minister Jack Marshall was unable to convince Keith Holyoake to include McKay in the cabinet. Holyoake thought that McKay had not sufficiently proved himself in the house, but later appointed him following a midterm vacancy based on Marshall's endorsement.[2]
Later life and death
After retiring from Parliament, he was elected a member of the Northland Harbour Board and served one term as its chairman.[1]
^Parliamentary Debates: House of Representatives. New Zealand Parliament. 30 October 1972. p. 3532. Retrieved 9 October 2023. The Hon. Don McKay has served for 18 years as a member, and has been Minister of Health, Minister of Social Security, Minister in Charge of the Child Welfare Division, and Minister for the Welfare of Women and Children.