St. Helen's School, Abingdon was founded in 1903 by the Community of St Mary the Virgin to provide a Christian education for girls.

[2] St Helen and St Katharine enjoys close links with Abingdon School to add an element of co-education, with some joint sixth form teaching and classes as well as collaboration in other areas, including music, drama, debating and many social events, as well as a joint school bus service.

In 2023, the school opened a new Sixth Form Centre, the Benedict Building, featuring 9 classrooms, a Higher Education Library, independent and group study spaces, a lecture hall and café.

[5] The curriculum includes Art and design, Biology, Ceramics, Chemistry, Classics, Computer science, Design Technology, Drama and theatre, Economics, English Language and Literature, Food and nutrition, French, Geography, German, Politics, Greek, History, Latin, Mandarin, Mathematics, Further Mathematics, Music, Personal Development, Physical Education, Physics, Psychology, Religion, Philosophy and Ethics (RPE), and Spanish.

[6] Major sports include lacrosse, netball, athletics, tennis, football and cricket, as well as basketball, cross country, hockey, trampolining, badminton, rugby, gymnastics, swimming, fencing and dance.