SD may refer to:

  • Salvia divinorum, a psychoactive plant
  • Sekolah Dasar, an Indonesian junior school
  • Sindhi language's ISO 639-1 code
  • Sisters of the Destitute, a Syro-Malabar Catholic women's order
  • Sleeping Dogs, a 2012 video game
  • Slobodna Dalmacija, a newspaper
  • Southern Cross Decoration (SD), a South African military award
  • Spasmodic dysphonia
  • Sudan Airways' IATA airline designator

Read more about SD:  Organizations, Places, Science and Technology, Sports