Muriel Amy Cornell (born Gunn; 27 September 1906 – 8 March 1996) was a British athlete and world record holder for the long jump.

Cornell was born in 1906 in Mitcham, then part of Surrey, to Frederick William Gunn and Beatrice Minnie, née Loosemore.

Cornell exceeded Hitomi's world record jump of 5.5 m, but she left a mark in the sand after she turned to speak to an official before leaving the pit.

At a match against Germany in Birmingham in 1930, Cornell set a British record of 5.80 metres (19 feet 0 inches), becoming the first 19 ft jump by a European.

[2] She also managed the women's team at the 1936 Summer Olympics in Berlin[1] and helped to establish a national coaching scheme after World War II.