Glandyfi Castle in Glandyfi, Ceredigion, Wales, is a mock castle dating from the early 19th century. It was built for George Jeffreys, described by some as an evangelist, and by others as a barrister, circa 1819. His great-uncle, Edward, had purchased the estate in 1792. The architect is not known, although John Hiram Haycock has been suggested. Jeffreys and his wife were friends of Thomas Love Peacock, the novelist and poet, whose wedding took place at the castle in 1820.