Stephen Albert "Steve" Macknowski (February 16, 1922 – April 4, 2013) was an American sprint canoeist who competed in the late 1940s.

At the 1948 Summer Olympics in London, he won two medals with Steven Lysak with a gold in the C-2 10000 m event and a silver in the C-2 1000 m events.

[1] A native of Yonkers, New York, Macknowski attended Columbia University and later became an insurance agent.

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