In this guide
The geography of London international schools
London's international schools cluster in a tight band running from St John's Wood in the north, through Marylebone and Mayfair, down through Kensington and Chelsea, west through Hammersmith and Fulham, and on to Chiswick and Acton. Outside this band, the international school field thins quickly. South London, east London and the City have only a small number of international schools, primarily the national curriculum schools (French Lycee, German School in Petersfield, Japanese School in Acton) and the smaller specialist schools.
The distribution matters because the practical decision for most expat families is not which school is best in the abstract, but which two or three schools are realistic from where they will live. Add a London commute of 40 to 60 minutes at peak times, and the school by area framing becomes the dominant variable.
For the wider London market view, see our London city guide. For curriculum specifics our IB guide and British curriculum guide are the right next step.
Central London: Westminster, Kensington and Chelsea
The central London international cluster is the densest in Europe. The American School in London (ASL) in St John's Wood is the largest American curriculum school in central London, with around 1,400 students from kindergarten through high school and a strong AP and Advanced Placement Capstone programme. International Community School (ICS) in Regent's Park offers the IB continuum in central London. Hampstead Fine Arts College serves a more specialist student profile. Lycee Francais Charles de Gaulle in South Kensington is the largest French school in London with three sister campuses across the city. King Fahad Academy in Acton serves the Arabic and Muslim community.
Within Kensington and Chelsea proper, Knightsbridge School, Eaton Square and several smaller schools serve the very young (3 to 11), while the borough's grammar and selective state schools serve older children. Many central London families on long postings move toward the British independent day school market (Westminster, City of London Boys, City of London Girls) for upper secondary rather than continuing in the international school system.
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West London: Hammersmith, Fulham, Chiswick
West London has a strong cluster of international schools serving the corporate expat community based around west of Hyde Park. Halcyon London International School in Marylebone (technically central but serves the west London corridor) offers the IB continuum. Marymount International School in Kingston upon Thames is the heritage Catholic IB school for girls, drawing from west London commuter areas. International School of London (ISL) in Gunnersbury, Chiswick, runs the IB continuum and is the established west London option for international families.
The Hammersmith, Fulham and Chiswick borough catchment is the practical choice for many corporate families on London postings, particularly those with one partner working in the City and the other in the Heathrow corridor. Housing is more accessible than central London while still being within a 30 minute tube to Bank or Liverpool Street.
Northwest London: St John's Wood, Hampstead, Barnet
Northwest London is the heart of the American expat community, anchored by ASL in St John's Wood. Southbank International School has a campus in Hampstead alongside its central and Kensington campuses. The American School Hampstead serves the wider American community. The Japanese School in London in Acton serves the Japanese community. Mill Hill International in Barnet offers a small IB option.
The northwest London catchment combines the international school cluster with strong British state and independent options, which gives families flexibility to switch routes mid posting. Hampstead, St John's Wood and West Hampstead have strong housing stock for families, with the trade off being premium prices.
South London and the Surrey commuter belt
South London has comparatively few central international schools, but the Surrey commuter belt outside the M25 hosts two of the largest international schools in the country. ACS Cobham International School in Cobham has around 1,400 students across the IB and American curriculum, with school bus routes serving south London and the western City fringe. TASIS England in Thorpe, also in Surrey, offers an American curriculum with strong AP provision. ACS Egham is a smaller sister school. Within London proper, Dulwich College is a British independent day school with strong international cohort.
The case for the Surrey belt is family lifestyle, with larger homes, gardens and the rural commuter pattern that suits many American and Northern European families. The case against is the commute to central London, which is 45 to 70 minutes by train at peak, and the school bus dependency for children.
Which to pick if
Pick central London (Westminster, Kensington) if your work is in the City or West End and you want maximum walkability. ASL, Southbank International and the central French and German schools are all within a short commute, and the lifestyle is the most urban of any London family option.
Pick west London (Hammersmith, Chiswick) if you want a balance of housing value and central school access. ISL Chiswick and Halcyon between them cover the major IB options. Housing is more accessible than central, the District and Piccadilly lines give strong central access, and the Heathrow corridor is convenient for international travel.
Pick northwest London (St John's Wood, Hampstead) if you are an American family or want strong British and international school optionality side by side. ASL is the natural choice for American families. The British independent school market in this catchment is also exceptionally strong.
Pick the Surrey commuter belt (Cobham, Egham) if you want a family villa lifestyle and accept a commuter train pattern. ACS Cobham and TASIS England both offer credible IB and American programmes in large parkland campuses.
When international families switch to UK independents
A pattern worth flagging for any long term London family is the mid posting switch from an international school into the UK independent day school market. Westminster, City of London, St Paul's, Highgate, Latymer Upper, North London Collegiate and the King's Group schools collectively absorb a meaningful share of senior school transfers from ASL, ISL and Southbank. The motivation is usually a combination of UK university targeting, a desire for the British academic style, and the financial reality that several UK independents charge less than the international school equivalents while delivering Oxbridge and Russell Group outcomes at the top of the UK system.
The practical bottleneck is the entry assessment. Most UK independent senior schools assess at 11+, 13+ or 16+, and the assessment style favours children who have been through the UK preparatory school cycle. International school children switching at 11+ or 13+ usually need a tutoring programme in the year before the entry assessment, particularly in mathematics where the UK preparatory school curriculum runs ahead of the IB Primary Years standard. For families considering this pivot, the planning window is the year before assessment, not the assessment year itself.
FAQ
How long are typical London international school waitlists? 6 to 12 months at ASL, ISL and Southbank for popular year groups. Shorter at the newer schools and the language specific schools (French, German, Japanese) for citizens of those countries.
Are there competitive IB Diploma options in London? Yes. ISL, Southbank, Halcyon, ICS, ACS Cobham and Marymount all offer the IB Diploma with credible cohort sizes and university destinations.
Can my child attend a UK state school as an expat? Yes, with appropriate residency. The state route works particularly well for primary aged children where catchment is the main entry mechanism. For older children seeking selective state grammars, the entry test is competitive.