Fort Nassau may refer to:
Fort Nassau (North River), established 1614 in Albany, New York Fort Nassau (South River), established 1623 in Gloucester City, New Jersey Old Fort of Nassau, established 1697, in The Bahamas, which, as a British fort, was attacked by U.S. Marines in 1776 Fort Nassau (Ghana), established near Mori Fort Nassau (Guyana), on the Berbice River Fort Nassau, Banda Islands, on the island of Bandaneira, in Indonesia, constructed in 1609 Fort Nassau (Curaçao), established as Fort Republiek in 1797
See also Nassau (disambiguation)