The Bangkok Patana School (Thai: โรงเรียนบางกอกพัฒนา, RTGS: Rong Rian Bangkok Phatthana) is a British International School located in Bang Na District, Bangkok, Thailand. Bangkok Patana School was founded in 1957 to provide a British-style education for the children of English-speaking expatriates and others living in Bangkok. It is Thailand's oldest British international school. As of 2010, it is also the largest British school in the country.