Aleksandr Dyadchuk (born 5 February 1983 in Alma-Ata) is a Kazakhstani sprint canoeist who competed in the late 2000s and 2010s.

At the 2008 Summer Olympics in Beijing, he was eliminated in the semifinals of the C-2 500 m event.

At the 2012 Summer Olympics he was eliminated in the semi-finals of both the C-1 200 m and the C-1 1000 m events.

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