The Honourable Alexander Stirling MacMillan
A.S. MacMillan (4th to the left)
13th Premier of Nova Scotia
In office July 10, 1940 – September 8, 1945
Monarch	George VI
Lieutenant Governor	Frederick F. Mathers Henry Ernest Kendall
Preceded by	Angus L. Macdonald
Succeeded by	Angus L. Macdonald
Member of Legislative Council
In office June 25, 1925 – September 5, 1928
MLA for Digby County
In office October 1, 1928 – August 22, 1933 Serving with Joseph Willie Comeau
Preceded by	William Hudson Farnham John Louis Philip Robicheau
Succeeded by	Joseph Willie Comeau
MLA for Hants
In office August 22, 1933 – October 23, 1945
Preceded by	Albert E. Parsons Edgar Nelson Rhodes
Succeeded by	Robert A. MacLellan
Personal details
Born	(1870-10-31)October 31, 1870 Upper South River, Nova Scotia
Died	August 7, 1955(1955-08-07) (aged 83) Halifax, Nova Scotia
Political party	Liberal
Occupation	businessman

Alexander S. MacMillan (October 31, 1870 – August 7, 1955) was a Nova Scotia politician and businessman, the 13th premier of Nova Scotia, from 1940 to 1945.

MacMillan was born in Upper South River in Antigonish County. He made his fortune in lumbering and construction before being made chairman of the Nova Scotia Highways Board in 1920 and serving briefly as minister of highways in 1925. He was a member of Nova Scotia's appointed upper house, the Legislative Council from 1925 until 1928 when he won a seat in the Nova Scotia House of Assembly as a Liberal. He again became minister of highways in 1933. In 1940, when Premier Angus L. Macdonald went to Ottawa to serve in the wartime cabinet of William Lyon Mackenzie King, MacMillan became premier in his place. He retired as premier and from politics in 1945 to allow Macdonald to resume his provincial career. MacMillan died in Halifax at the age of 83.

References

• Marble, Allan Everett (1977). Nova Scotians at home and abroad: biographical sketches of over six hundred native born Nova Scotians. p. 289. ISBN 0-88999-074-3. Retrieved August 29, 2009.