Ambrose Campbell Carmichael, MC (19 September 1871 – 15 January 1953) was an Australian politician, soldier and accountant, a member of the New South Wales Legislative Assembly for 12 years and a minister in the McGowen and Holman Labor governments.

He was educated at Hobart and then held a variety of occupations, including coaching in Brisbane and farming on the Lachlan River, where he became involved in the Farmers' and Settlers' Association of New South Wales.

[1] He was the Labor candidate for Leichhardt in 1907 and he was successful, defeating the sitting Liberal Reform member Robert Booth, with a margin of 485 votes (6.1%).

He was dropped from the ministry in November 1911, but was returned as Minister of Public Instruction from March 1912, briefly also serving as Treasurer from April to May 1912 and adding Labour and Industry from December 1912 until June 1913.

He ran another recruitment campaign to raise a second "Carmichael's thousand", which left Sydney in June 1918, arriving in France in late September when the war was ending.