393rd or 393d may refer to:
- 393d Bomb Squadron (393 BS) is part of the 509th Bomb Wing at Whiteman Air Force Base, Missouri
- 393d Bombardment Group, inactive United States Air Force unit
- 393d Bombardment Squadron (Medium) (1942), inactive United States Air Force unit
- 393d Fighter Squadron or 179th Fighter Squadron, unit of the Minnesota Air National Guard 148th Fighter Wing located at Duluth Air National Guard Base, Minnesota
- 393rd (Hampshire) Heavy Anti-Aircraft Regiment, Royal Artillery or 1st Hampshire Engineers, formed in 1862 responsible for the port defences of the South Coast of England
- 393rd Infantry Regiment (United States), U.S. Army Reserve regiment that is assigned to 75th Infantry Division (Training Support)
See also
- 393 (number)
- 393, the year 393 (CCCXCIII) of the Julian calendar
- 393 BC
- All pages with titles beginning with 393d
- All pages with titles containing 393d
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