J15

J15 may refer to:

Vehicles

Aircraft

• Junkers J 15, a German experimental aircraft
• Shenyang J-15, a Chinese carrier-based jet fighter

Locomotives

• GSR Class J15, an Irish steam locomotive
• LNER Class J15, an English steam locomotive class

Ships

• INS Investigator (J15), a Sandhayak-class survey ship of the Indian Navy

Other uses

• Bacterial pneumonia
• County Route J15 (California), a County route in Tulare County, California
• Elongated square bipyramid, a Johnson solid (J₁₅)
• J15, a Nissan J engine model