OAQ may refer to:

• Quito Astronomical Observatory (Observatorio Astronómico de Quito)
• Overall Allotment Quantity
• Ordre des architectes du Québec
• The Swiss Center of Accreditation and Quality Assurance in Higher Education, OAQ

• Pilsudski, Jozef Klemens
• Pilsudski Mound
• Pilsudsky
• Pilsum lighthouse
• Pilsun
• Pilszcz
• Pilsētprojekts
• Piltdown Bird
• Piltdown Chicken
• Pilt down man
• Piltdown Men
• Piltel
• Piltene Parish
• Pilten Nunatak
• Pilter
• Pilton Bluecoat CofE Primary School
• Pilton (disambiguation)
• Pilton, Northamptonshire
• Pilton Pop Festival
• Pilton Priory
• Pilton, Queensland
• Piltown Cross ambush
• Piltown national school
• Piltsch
• Piltun-Astokhskoye-A platform