Eaton Hall is a large house in King City, Ontario, Canada, built in the Norman style for Lady Eaton in 1938–39 on a 700-acre (2.8 km²) parcel of land. Lady Eaton and her husband, Sir John Craig Eaton acquired the land in 1920 and 1922 on recommendation from their friend Sir Henry Pellatt, who owned the nearby Mary Lake property. Lady Eaton moved into Eaton Hall three years after selling her city mansion, Ardwold. The house is adjacent to a body of water named Lake Jonda, and nestled within the temperate forests of King Township. Upon completion, it contained 72 rooms. It became a beloved gathering place for the Eaton Family, owners of the Eaton's department stores based in Toronto.

King City is an unincorporated Canadian community in the township of King, Ontario, located 40 kilometres (25 mi) north of Toronto. It is the largest community in King township, with 2,730 dwellings and a population of 8,396 as of the 2021 Canadian census.