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