SZD may refer to:
- Schizoaffective disorder, a psychiatric diagnosis with symptoms of a mood disorder and schizophrenia
- Sheffield City Airport (IATA code)
- The Soviet Railways (Sovetskie Zheleznye Dorogi)
- A microcar made by SeAZ, SZ cycle-car series
- Szybowcowy Zakład Doświadczalny, a glider manufacturer in Poland
disambiguation page lists articles associated with the title SZD.
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