Mount Albert Grammar School, commonly known as MAGS, is a co-educational state secondary school in Mount Albert in Auckland, New Zealand. It teaches students in year levels 9 to 13. As of August 2021, Mount Albert Grammar School is the second largest school in New Zealand, behind Rangitoto College.

Mount Albert is an inner suburb of Auckland, New Zealand, which is centred on Ōwairaka / Mount Albert, a local volcanic peak which dominates the landscape. By 1911, growth in the area had increased to the point where Mount Albert was declared an independent borough, which was later absorbed into Auckland. The suburb is located 7 kilometres (4.3 mi) to the southwest of the Auckland City Centre.