St. Stanislaus High School is a private primary and secondary school for boys located in Bandra, Mumbai, Maharashtra, India. Established in 1863 by German Jesuit priests as an orphanage, it has since evolved into a comprehensive institution serving both day students and boarders, with over 2,300 students from kindergarten to grade 10. The school is spread over a campus of approximately seven acres, making it one of the largest schools in Mumbai.