🇬🇧 London
Best International Schools in London
The top-rated international schools in London include Marymount International School London, The American School in London, ACS International Schools (Cobham, Egham & Hillingdon). BrightKey has independently rated 8 schools on verifiable public data — ordered by inspection & accreditation tier, with no payments from any school.
What “best” means here
This is not a paid ranking — no school can buy a position. Order follows our transparent tier: in markets with a graded public inspectorate (e.g. Dubai's KHDA), by the verifiable inspection band; where there is none, by accreditation depth and curriculum authorisation, capped at A. Within a tier, schools are listed alphabetically. School-reported university placement is always flagged and never tiered.
Read the full tiering methodology.
An intimate, all-girls Catholic IB school with a deep international identity and an ISI 'Excellent' track record.
The leading US-curriculum day school in London: Ofsted 'Outstanding', deep American programme with 20+ AP subjects, and a price tag to match.
A long-established American-and-IB group of three Greater London campuses, strongest for internationally mobile families seeking US-pathway and IB options under one operator.
A modern, central-London senior and sixth-form college with a strongly international intake and a creative/media bent, best for ambitious 13-19s who want city-centre 'urban boarding' rather than a traditional campus boarding-school experience.
A young, small-by-design IB secondary school in central London with a distinctively innovation-led, tech-forward ethos and an IB Diploma average above the world mean.
A long-established, non-selective full-IB-continuum international school in West London whose genuine differentiator is an unusually deep mother-tongue and EAL programme — 24 home languages taught as part of the curriculum and a majority of leavers earning the bilingual IB Diploma.
A premium, fully IB-continuum international school in central London with strong published Diploma results and a highly international community, inspected by the ISI under its current standards-based framework.
A long-established American international school on a green Surrey campus, pairing a US diploma and AP with the IB Diploma, and offering boarding from age 13.
You can also browse the full directory and sort it yourself, or compare schools side-by-side.