Anita Elizabeth Harding was an Irish-British neurologist, and Professor of Clinical Neurology at the Institute of Neurology of the University of London. She is known for the discovery with Ian Holt and John Morgan-Hughes of the "first identification of a mitochondrial DNA mutation in human disease and the concept of tissue heteroplasmy of mutant mitochondrial DNA", published in Nature in 1986. In 1985 she established the first neurogenetics research group in the United Kingdom at the UCL Institute of Neurology.