Q42

Q42 may refer to:

Vessels

 * ARA Cabo San Antonio, a tank landing ship of the Argentine Navy
 * FRENCH SUBMARINE Opale
 * Al-Rasikh, a Khareef-class corvette of the Royal Navy of Oman

Other uses

 * Q42 (New York City bus)
 * Ash-Shura, the 42nd surah of the Quran