J19

J19 may refer to:

Roads

 * County Route J19 (California)
 * Johor State Route J19, in Malaysia

Locomotives

 * GSR Class J19, an Irish steam locomotive
 * LNER Class J19, a British steam locomotive class

Ships

 * HSWMS Småland, a Halland-class destroyer of the Swedish Navy
 * INS Nirdeshak, a Sandhayak-class survey ship of the Indian Navy

Other uses

 * J19 (journal), a scholarly journal
 * Elongated square cupola, a Johnson solid (J19)