Seton Howard Frederick Lloyd, CBE (30 May 1902 – 7 January 1996), was an English archaeologist.
After education at Uppingham School, he studied at the Architectural Association in London and qualified as an architect in 1926.
He gained his first archaeological experience at Tel el Amarna, which Henri Frankfort was excavating for the Egypt Exploration Society.
In 1930 Lloyd was invited by Frankfort to join latter's next excavation, under the auspices of the Oriental Institute of the University of Chicago, of a series of sites in the Diyala valley (1930–1937).
In 1937–1939 he excavated with John Garstang at Mersin, in southern Turkey, for the University of Liverpool.