St. Mary's School is a Jesuit-run secondary school located on Nesbit Road, Mazagaon in the city of Mumbai, India. The school is affiliated with Bombay's Church of St. Anne, which is adjacent to the school. St. Mary's is an Indian Certificate of Secondary Education (ICSE) affiliate. Having been founded in the year 1864, it is also amongst the oldest, continually running, private schools in India. The School is therefore one of the most established institutions of preference for education and holistic development for children in the city.