Alexander Ewan Armstrong (15 June 1916 – 27 April 1985) was a politician, grazier and businessman in New South Wales, Australia.

He attended Scots College and became a grazier, working first on the family's Albury property and then at Winderadeen and Collector.

[citation needed] A member of the Liberal Party, he was elected to the New South Wales Legislative Council in 1952.

[1] In 1968 the Supreme Court found that Armstrong had threatened to have a business associate killed,[2] and on 25 February 1969 the Legislative Council passed a resolution that he was guilty of conduct unworthy of a member of the council and that he be expelled.

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