SZD

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
• Suzhou East railway station, China Railway pinyin code SZD