| Flagstaff Fort | |
| Location: | Staten Island, New York |
| Type: | Redoubt |
| Built: | June 1776 |
| Builder: | Patriot forces |
| Used: | 1776-1783 |
| Demolished: | Replaced by Fort Tompkins in 1806 |
| Coordinates: | 40.605°N -74.0567°W |
| Pushpin Map: | USA New York City#USA New York#USA |
| Pushpin Mapsize: | 250 |
| Ownership: | National Park Service |
| Occupants: | National Park Service |
| Battles: | American Revolutionary War |
A Patriot redoubt built in June 1776, located on Signal Hill at The Narrows on Staten Island. Site of an earlier 1663 blockhouse that stood until at least 1808,[1] preceded by one built by Dutch settler David Pieterszen de Vries in 1636 and destroyed in the Peach War of 1655.[2] Taken by the British in July 1776 and by July 1779 a redoubt with gun platforms for 26 cannon was built. Two months later, six 24-pounders and four 18-pounders were recorded on hand. In 1782 the fort had five bastions and several barbette batteries. Evacuated by the British in 1783 at the end of the Revolution.[1] In 1806 Flagstaff Fort was demolished and Fort Tompkins was built on the site, reportedly enclosing the 1663 blockhouse with red sandstone.[3] That fort along with others grew into Fort Wadsworth.[3] The site is now part of the Gateway National Recreation Area of the National Park Service.