St Clare's is a coeducational private, international day and boarding college in North Oxford, England. St Clare's is an IB World School, offering the International Baccalaureate Diploma and a Preparatory IB programme, as well as English Language programmes, University Pathway and Gap Year programme, Summer and Short courses, and Teacher Training.

Programmes for adults include the University Foundation Programme, English language, English plus Academic Subjects and an Undergraduate Programme. In the summer months, adults, teenagers and juniors can study English language programmes on three separate sites.

The school is consistently listed in the Top 20 IB Schools in the UK School League Tables from Education Advisers Ltd. In 2025, the average score was 35, compared to a world average of 31 points.