Diana Elizabeth Wilkinson (born 17 March 1944 in Stockport, Cheshire) is a retired British freestyle swimmer.

She competed in the British Empire and Commonwealth Games from 1958 to 1966, the 1958 and 1962 European Aquatics Championships, and the 1960 and 1964 Summer Olympics.

[2] Wilkinson was just 16 years old when she represented Great Britain at the 1960 Summer Olympics in the 100 metre freestyle, in the event she finished in third place in her heat and didn't qualify for the next round.

Four years later she competed in two events at the 1964 Summer Olympics, she entered the 100 metre freestyle again and this time she finished fifth in her heat so didn't advance to the next round, she was also a part of the 4 × 100 metre freestyle relay team which finished last in there heat and didn't advance to the final.

She represented England and won a bronze medal in the freestyle relay at the 1958 British Empire and Commonwealth Games in Cardiff, Wales.