Stoneleigh-Burnham School (SBS) is an independent boarding and day school for girls in grades 7–12 and postgraduate. Founded in 1869, the school is a combination of five founding schools in New England, but resides today on a 100-acre (0.40 km2) campus in Greenfield, Massachusetts, United States, located in the Pioneer Valley. Stoneleigh-Burnham is affiliated with the National Coalition of Girls' Schools (NCGS), the National Association of Independent Schools, , and is accredited with the New England Association of Schools and Colleges.