The John Lyon School is an academically selective independent boys' school in Harrow on the Hill, London, England. The school was founded in 1876 by the Governors of Harrow School for the education of local boys, in belated keeping with the wishes of John Lyon, Harrow School's founder. The John Lyon School still maintains its historic ties with Harrow School, and the two schools are closely partnered. The school is a member of the Headmasters' and Headmistresses' Conference.