SM1

SM1 can refer to:


 * SM-1, a nuclear reactor
 * SM1, a postcode district within the SM postcode area, in Sutton, Greater London
 * Signalman First Class, a former rating in the U.S. Navy
 * A surface-to-air missile, RIM-66 Standard (SM-1MR) or RIM-67 Standard (SM-1ER)
 * VR Class Sm1, a type of train operated by the VR Group
 * Spider-Man, the first film in the Spider-Man film series
 * Scary Movie, the first film in the Scary Movie series
 * Superman, the first Superman film
 * SM1, Secondary Math 1