J30 may refer to:

Vehicles

;Automobiles *

Honda J30 The J-series is Honda's fourth production V6 engine family introduced in 1996, after the Honda C engine, C-series, which consisted of three dissimilar versions. The J-series engine was designed in the United States by Honda engineers. It is built ...

, an automobile engine *

Infiniti J30 The Infiniti J30, marketed as the Nissan Leopard J Ferie in Japan, was a rear wheel drive luxury car. The J30 went into production on April 7, 1992 as a 1993 model to replace the M30 (which was a coupe), and was launched in the United States afte ...

, a Japanese luxury car *

Nissan J30 The Nissan Maxima is a full-size car manufactured and marketed by Nissan and offered as Nissan's flagship sedan primarily in North America, the Middle East, and China — and currently in its eighth generation. Having debuted for model year 1 ...

, a Japanese sedan * Toyota Land Cruiser (J30), a Japanese off-road vehicle ;Boats * J/30, keelboat ;Locomotives * GSR Class J30, an Irish steam locomotive

Other uses

* Pentagonal orthobicupola, a Johnson solid (J₃₀) * Rhinitis * Westinghouse J30, a turbojet engine * J30 index, a stock index tracking the Tokyo Stock Exchange {{Letter-Number Combination Disambiguation