Lawrence A. MacAulay PC MP (born September 9, 1946) is a Canadian politician, who has represented the riding of Cardigan, Prince Edward Island in the House of Commons since 1988.

In 1998, he was appointed Solicitor General of Canada and served in that role until his resignation from Cabinet on October 21, 2002, during a conflict of interest inquiry.

On March 20, 2014, MacAulay became the longest-serving MP in the history of Prince Edward Island, surpassing the record previously set by Angus MacLean.

On July 26, 2023, Trudeau shuffled his cabinet, appointing MacAulay as Minister of Agriculture for the second time.

In December 2022, MacAulay was confronted in parliament by other MPs on multiple reports of Veterans Affairs Canada offering medical assistance in dying (MAID) to veterans seeking medical care.