Sir John Francis Cleverton Snell (15 December 1859 – 6 July 1938) was a British electrical engineer and administrator.
From 1892 he worked as assistant to General Charles Edmund Webber on electrical supply projects in Kensington and a number of country houses, before entering municipal service in London in 1893 as assistant electrical engineer in St Pancras during the construction of the Kings Road power station.
During that time he served as an expert witness for the General Post Office in a case involving compensation payments to National Telephone Company, after which he was given a knighthood (in 1914).
After the war he left the consulting company (by then Preece, Cardew, Snell and Rider) to advise the government of matters of electrical supply.
In 1928 he began introducing major new electricity power systems in the West of England with his friend and then colleague, Dr John A.