Microjet may refer to:
Aviation Bede BD-5J, a series of small, single-seat homebuilt aircraft Microjet 200, a small jet trainer aircraft built by Microjet SA Microturbo, manufacturer of small turbojet engines US Microjet LLC, an American manufacturer of very small turbine engines SubSonex, a small homebuilt jet built by Sonex Aircraft An early term for the type of aircraft now known as Very Light Jets
Other MicroJet Technology Co. Ltd, a Taiwanese manufacturer of inkjet printing technology A very small rocket fired by a type of hand-held firearm called the Gyrojet