Elizabeth C. Long (born 30 July 1946) is a British former swimmer. She competed in three events at the 1964 Summer Olympics. She represented England and won two bronze medals in 440 yards individual freestyle and 440 yards freestyle relay, at the 1962 British Empire and Commonwealth Games in Perth, Western Australia. Four years later she participated in the 440 yards individual freestyle at the 1966 British Empire and Commonwealth Games in Kingston, Jamaica.