Aylesbury High School (AHS) is a girls grammar school in Aylesbury, Buckinghamshire. It was founded in 1959, when the previously co-educational Aylesbury Grammar School (founded 1598) split to become two single-sex grammar schools. The two institutions remain on adjacent sites. The school takes its pupils from a wide area as far from Aylesbury as Oxford and Milton Keynes, as admissions are determined by the eleven-plus. The current headmistress is Marieke Forster.

The school is colloquially referred to by locals as "Aylesbury Girls'" and by the students as "the High" or "AHS".