The Erie-class gunboats were a class of gunboats built by the United States prior to World War II. The class was designed in 1932, and commissioned into the United States Navy in 1936: Erie (PG-50) and Charleston (PG-51). The Eries had a design speed of 20 knots (37 km/h; 23 mph) and a main armament of four 6-inch (152 mm) guns in single mounts with four 1.1-inch (28 mm) quadruple mount anti-aircraft guns.