Chatham Naval Memorial is a large obelisk situated in the town of Chatham, Kent, which is in the Medway Towns. The memorial is a feature of the Great Lines Heritage Park. The huge expanse of the Great Lines was in its own right a layer of defence to protect Chatham Dockyard from attack.

Chatham is a town located within the Medway unitary authority in the ceremonial county of Kent, England. The town forms a conurbation with neighbouring towns Gillingham, Rochester, Strood and Rainham. In 2020 it had a population of 80,596.