S64 may refer to: Aviation Blériot-SPAD S.64, a French biplane trainer Savoia-Marchetti S.64, an Italian endurance aircraft Sikorsky S-64 Skycrane, later the Erickson S-64 Aircrane, an American helicopter Stanford Airport, in Judith Basin County, Montana, United States
Rail and bus S64 (Long Island bus), United States S64, a Schaffhausen S-Bahn railway service in Switzerland and Germany
Other uses Dharug language S64: If swallowed, rinse mouth with water (only if the person is conscious), a safety phrase
S64, a postcode district for Mexborough, England