J19 may refer to:
Roads edit
- County Route J19 (California)
- Johor State Route J19, in Malaysia
Vehicles edit
Locomotives edit
- GSR Class J19, an Irish steam locomotive
- LNER Class J19, a British steam locomotive class
Ships edit
- HSwMS Småland (J19), a Halland-class destroyer of the Swedish Navy
- INS Nirdeshak (J19), a Sandhayak-class survey ship of the Indian Navy
Other uses edit
- J19 (journal), a scholarly journal
- Elongated square cupola, a Johnson solid (J19)