Basic Education High School No. 1 Lanmadaw (Burmese: အခြေခံ ပညာ အထက်တန်း ကျောင်း အမှတ် (၁) လမ်းမတော်; commonly known as Lanmadaw 1 High School or St. John's High School), located in Lanmadaw township, is a public high school in Yangon. The school's main colonial era building is a landmark protected by the city, and is listed on the Yangon City Heritage List.