Ethel M. McGary (October 21, 1907 – May 5, 1975), also known by her married name Ethel Engelsen, was an American competition swimmer who swam for the Women's Swimming Association (WSA), and represented the United States at the 1928 Summer Olympics in Amsterdam.

[1] Although she competed in the 400-meter freestyle in the 1928 Olympics, she was truly more suited to longer lengths.

She also helped the WSA win the team title in same competition in 1927 and 1929–30.

With the WSA, McGary won AAU championships in the 4x200-yard relay in 1924–1925 and 1927–1929.

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