Fort Lytton is a heritage-listed 19th century coastal fort in the suburb of Lytton in Brisbane, Queensland, Australia. The name “Fort Lytton” is also used to describe the 1 square mile (2.6 km2) military base that surrounded the fort. Fort Lytton was built in 1880–1882, and operated until 1965. The historic fort is now contained in Fort Lytton National Park. The park is open to the public on most Sundays and public holidays. Guided tours are provided by Fort Lytton Historical Association, a non-profit volunteer organisation.