Fort Frederick is a historic military building located on Point Frederick on the grounds of the Royal Military College of Canada (RMC) in Kingston, Ontario, Canada. Its construction dates to 1846 and the Oregon boundary dispute. The fort consists of earthworks surrounding a Martello tower. Fort Frederick is included in two separate National Historic Sites of Canada: Kingston Fortifications National Historic Site and the Point Frederick Buildings National Historic Site.

Point Frederick is a 41-hectare (101-acre) peninsula in Kingston, Ontario, Canada. The peninsula is located at the south end of the Rideau Canal where Lake Ontario empties into the St. Lawrence River. Point Frederick is bounded by the Cataraqui River to the west, the St. Lawrence River to the south, and Navy Bay to the east. The peninsula is occupied by the Royal Military College of Canada (RMC). Several of the buildings located on Point Frederick and the site of the old naval dockyard are national historic sites. Fort Frederick, at the south end of the peninsula, is a feature of the Kingston Fortifications National Historic Site of Canada.