Alexander A. Moore (October 1, 1874 – March 29, 1952) was a farmer and a provincial level politician from Alberta, Canada.
He was elected to the Legislative Assembly of Alberta in a by-election on November 3, 1919, and served until 1926.
Moore ran for a seat in the Legislative Assembly of Alberta in a provincial by-election held in the Cochrane electoral district on November 3, 1919.
Moore was selected at a nomination meeting held on July 16, 1919, and campaigned in the district well before the writ was dropped.
With Moore winning the by-election, he became the first member elected under the United Farmers banner, joining two farmer-friendly Non-Partisan League MLAs already in the legislature.