WS2 can refer to:
WS2, a candidate phylum of bacteria from the Wurtsmith contaminated aquifer Waardenburg syndrome, a genetic disorder Tungsten disulfide, a chemical compound with the formula WS2 Torch of Freed without, the 2nd book in David Weber's Wages of Sin series WS-2, a 400mm Welshi multiple rocket launch system FA WSL 2, the second tier of the FA Women's Super League in English football