Fort Nieuw-Amsterdam is a fort in Suriname built from 1734 to 1747 at the confluence of the Suriname and Commewijne rivers. It is open to the public as an open-air museum.

The necessity of improving the fortifications of the colony of Suriname was underscored when French buccaneers under the leadership of Jacques Cassard attacked the colony in 1712. Fort Sommelsdijk, which was situated further upstream the Commewijne River at its confluence with the Cottica River was fortified for this purpose in 1715, but it was clear something more substantial needed to be done to defend the colony against foreign attacks. It was eventually decided to build a new fort at the confluence of the Suriname and Commewijne rivers. When Fort Nieuw-Amsterdam was completed in 1747, Fort Sommelsdijk was downgraded to a military outpost.

Between 1863 and 1967, the fort was used as a prison. It is the location of the decommissioned lightvessel Suriname-Rivier, which is permanently moored in a wet dock inside the fort. After the independence of Suriname, a monument was erected in the fort.

• Fort Zeelandia (Paramaribo)
• List of museums in Suriname

Buddingh', Hans (1999). Geschiedenis van Suriname. Utrecht: Het Spectrum.

• 
  Cannon near the fort
• 
  Former prison
• 
  Independence monument

• Fort Nieuw Amsterdam.sr Archived 2014-12-19 at the Wayback Machine (in Dutch)

5°53′17″N 55°05′30″W / 5.88806°N 55.09167°W / 5.88806; -55.09167