Blackheath High School is an independent day school for girls in Blackheath Village in southeast London, England. It was founded in 1880 as part of the Girls' Day School Trust; the Senior School occupied a purpose-built site in Wemyss Road for over 110 years.

Blackheath is an area in Southeast London, straddling the border of the Royal Borough of Greenwich and the London Borough of Lewisham. Historically within the county of Kent, it is located 1-mile (1.6 km) northeast of Lewisham, 1.5 miles (2.4 km) south of Greenwich and 6.4 miles (10.3 km) southeast of Charing Cross, the traditional centre of London.