John Alexander MacAulay, CC QC (May 29, 1892 – November 6, 1978) was a Canadian lawyer, businessman, and community volunteer from Winnipeg, Manitoba.

He was also involved with the Canadian Bar Association, and served a one-year term as the national president of the CBA.

In 1931, his status in the profession was recognized by his appointment as King's Counsel by the Manitoba government.

He was a vice-president and director of the Bank of Montreal, and is credited with bringing the Safeway grocery chain to Canada.

A fourth lawyer from Aikins MacAulay & Thorvaldson, A. Lorne Campbell, would also be president (1970-1971).