Queen Mary's School is an independent day and boarding school for girls in Baldersby Park near Topcliffe, between Ripon and Thirsk in North Yorkshire, England. Established in 1921, the school is set on 50 acres (200,000 m2) of landscaped grounds and houses approximately 300 pupils. It caters to girls aged 3 to 16 and boys up to age 7. The school is a member of the Woodard Corporation and attended the 200th anniversary of the birth of the movement's founder in 2011. In 2015 the school celebrated its 90th anniversary.