Loy is both a given name and a surname.
Loy may also refer to:
Loy (gastropod), a genus of sea slugs within the superfamily Onchidoridoidea USS Loy (DE-160), a destroyer escort of the United States Navy Loy (spade), a type of spade once used for manual ploughing in Ireland
See also De Loys's ape, an unconfirmed primate species now widely considered a misidentification or a hoax St Loy's Cove, a small bay in Cornwall, UK