John Augustine Macdonald (4 February 1913 – 4 January 1961) was a Progressive Conservative party member of the House of Commons of Canada. He was born in Cardigan, Prince Edward Island becoming a potato grower, general merchant, produce dealer by career.^[1]

His father was John Alexander Macdonald, a provincial politician then a federal Member of Parliament and Senator. The younger Macdonald served in World War II, commanding the Prince Edward Island Regiment.^[1] He was injured at Normandy in July 1944 and returned to Prince Edward Island. He won a seat at the 3rd Kings riding in a 1945 provincial by-election despite remaining in hospital recovering from his war injuries. He lost his riding in the 1947 provincial election, but returned to the provincial legislature in a 1951 election victory after which he became his party's whip and finance critic.^[2]

As a merchant, Macdonald became J. A. MacDonald & Co. Ltd.'s President and was a director for Associated Shippers, Inc. He also served on various boards and associations.^[2]

Macdonald was first elected to the House of Commons of Canada at King's riding in the 1957 general election and re-elected there in the 1958 election. Macdonald made two previous unsuccessful attempts to win a seat at King's in the 1949 and 1953 elections.

Macdonald died at his home in Cardigan, Prince Edward Island on the morning of 4 January 1961, during his term in the 24th Parliament.^[1] His wife, Margaret Mary Macdonald, succeeded him as the Member of Parliament for King's in a by-election later that year.