Margaret Olive Wellington (23 December 1926 – 10 March 2015) was a British swimmer.

Wellington won a bronze medal at the 1947 European Aquatics Championships in the 4 × 100 m freestyle relay.

[2] She finished fourth in the same event at the 1948 Summer Olympics.

[3][4][5] She won the 1948 ASA National Championship 110 yards freestyle title,[6] the 1949 ASA National Championship 220 yards freestyle title [7] and the 1949 ASA National Championship 440 yards freestyle title.

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