J16 may refer to:

Roads County Route J16 (California) Malaysia Federal Route J16

Vehicles GSR Class J16, an Irish steam locomotive , a Sandhayak-class survey ship of the Indian Navy LNER Class J16, a British steam locomotive class Shenyang J-16, a Chinese strike fighter aircraft

Other uses Elongated pentagonal bipyramid, a Johnson solid (J16) Pneumonia J16, an orca, mother of Scarlet