John Lyon School (formerly The Lower School of John Lyon) is an academically selective independent boys and girls' day school in Harrow on the Hill, Greater London, England. The school was founded in 1876, by the Governors of Harrow School for the education of local boys, in keeping with the belated wishes of John Lyon, Harrow School's founder. The school is a successor to the 'English Form' established in 1853, to educate local scholars. 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 (HMC).