Margaret R. O'Donnell (born 1938 – ) is a retired British tennis player who competed at the Wimbledon Championships[1] between 1959 and 1965.

She was active from 1956 to 1967 and won 13 career singles titles.. Margaret was born Liverpool, Lancashire, England as a junior she joined the team at Liverpool Cricket Club.

She won Lancashire Junior County Championships twice in 1955.

[2] Her career highlights include winning the North of England Hard Court Championships three times (1963, 1965–1966),[3] the Hoylake and West Kirby Open three times (1957–1958, 1961),[4] the Nottinghamshire Championships (1961), the Lee-on-Solent Open two times (1957–1958),[5] Torquay Open, (1961) St. Annes Open (1962),[6] and the Lancashire Championships (1963).

[7] Additionally she was finalist at the Essex Championships at Frinton-on-Sea (1956), Worthing Open (1958), the Bedford Open two times, (1958–1959), Carmarthenshire Championships at Llanelli two times (1959, 1964), the Scottish Hard Court Championships at St. Andrews (1961).