The King George III Museum was a museum within King's College London, England between 1843 and 1927 which held the collections of scientific instruments of George III as well as eminent nineteenth-century scientists including Sir Charles Wheatstone and Charles Babbage.

The museum was located within the King's Building designed by Sir Robert Smirke.

In the mid-nineteenth century the government discontinued the maintenance of Kew, giving rise to the need to house the collections elsewhere.

[2] The collection of electrical and mechanical apparatus for use in scientific experimentation, which had formed the nucleus of the royal collection and had served for the instruction of the royal children, was donated to the university by Queen Victoria in 1841 and the museum was opened by Albert, Prince Consort on 1 July 1843.

[1][3] The museum was located in a double-height galleried space opposite the Council Room in the King's Building designed by Sir Robert Smirke, part of the Strand Campus.