Silica or silicon dioxide is a chemical compound.

Silica may also refer to: Silica gel, a desiccant Silica, Rožňava District, Slovakia Silica, Kansas, United States Silica, Minnesota, United States Silica, West Virginia Silica, Wisconsin, United States USS Silica (IX-151), a boat Silica, a character from the light novel and anime series Sword Art Online

See also Siliqua (disambiguation)