- Nation: Union
- Type: Screw Sloop (Iroquois Class)
- Displacement: 1,032 tons
- Crew: 175
- Wartime Service Dates: 1862-1865
- Civil War Armament: 2 x 30-pdr Parrott Rifles, 1 x 20-pdr Parrott Rifle, 4 x 32-pdr guns, 1 x 12-pdr rifle)
- Notes: An Iroquois-class screw sloop, USS Wachusett was typical of the vessels used by the Union Navy for offshore blockading and intercepting Confederate commerce raiders. Commissioned in March 1862, Wachusett initially served with the North Atlantic Blockading Squadron before being transferred to the special "Flying Squadron." This organization was tasked with tracking down and sinking Confederate raiders. In February 1864, the ship was ordered Bahia, Brazil with orders to protect American commerce in the area. That October, Wachusett encountered the raider CSS Florida in Bahia harbor. Though technically in neutral waters, Wachusett's captain, Commander Napoleon Collins, ordered an attack. Catching Florida by surprise, men from Wachusett quickly captured the ship. After a brief refit, Wachusett received orders to sail for the Far East to aid in the hunt for CSS Shenandoah. It was en route when news was received that the war had ended.