NQO2 may refer to:

• NAD(P)H dehydrogenase, quinone 2, an enzyme
• Ribosyldihydronicotinamide dehydrogenase (quinone), an enzyme

• General atonement
• General Atonement
• General Auchinleck
• General Audience
• General audience
• General (Australia)
• General(Australia)
• General Authorities
• General Authority (LDS)
• General auxiliary officer
• General auxilliary presidencies
• General Average
• General average
• General avia
• General Avia F.22
• General Aviation XFA
• General Aziz Khan
• General Aztec
• General Aztec languages
• General Baba Baghel Singh
• General Baird
• General Baldissera
• General Bank of Greece
• General Bargewell
• General Bartolomé Mitre Railway