Macartney "Mac" Abbott (3 July 1877 – 30 December 1960) was an Australian politician.

Born in Murrurundi, New South Wales, he was educated at King's School, Parramatta.

He became a farmer and grazier in the Upper Hunter area of New South Wales.

He was the half brother of Joe Abbott, Member of the Australian House of Representatives (MP) for New England 1940–1949, and the cousin of Aubrey Abbott, MP for Gwydir 1925–1929 and 1931–1937.

In 1913 he was elected to the New South Wales Legislative Assembly as the member for Upper Hunter, first as a Liberal and then from 1916 as a Nationalist.