DSD may refer to:
Medical Detrusor sphincter dyssynergia, disorder of urination Disorders of sex development, differences of sex differentiation
Technology Data structure diagram of a data model Direct Stream Digital, Sony and Philips digital recording trademark Document Structure Description, a schema language for describing valid XML
Organizations Defence Signals Directorate, an Australian intelligence agency Department for Social Development Det Stavangerske Dampskibsselskap, a Norwegian transport and shipping company Drainage Services Department, Hong Kong Davis School District, Utah Delaware School for the Deaf
Government United States District Court for the District of South Dakota, abbreviation in case decisions Downing Street Declaration, by UK PM and Irish Taoiseach New Zealand Distinguished Service Decoration, a medal awarded by the New Zealand Defence Force
Media Do Something Different, a British CBBC television show
Other uses Deutsches Sprachdiplom (German Language Diploma), of the German Academic Exchange Service Discover Scuba Diving program Driver's Safety Device, or dead man's switch Raindrop size distribution in rain, snow, etc. Köppen climate classification#Dsd Subarctic or boreal climates with severe winters