Harry Hall (22 May 1906 Macclesfield, Cheshire – 15 February 1986 Kirstenbosch), was a British-born horticulturist, botanist and succulent plant authority.

During WWII he spent four years with the Royal Air Force, at the end of which he contacted Robert Harold Compton, director of Kirstenbosch in South Africa, inquiring about the possibility of a position there.

Starting with a very small succulent plant collection, Hall improved its stature to one of world renown by the time of his death.

He produced a small Longman's field guide 'Common Succulents' in 1955 illustrated by Elsie Garrett Rice, and collaborated with Harriet Margaret Louisa Bolus (1877–1970) on the Mesembryanthemaceae.

She had worked for the CSIR, been employed by the University of Pretoria in their Department of Plant Physiology and had been a school teacher before moving to Cape Town and Kirstenbosch, where she met Harry.