Box Hill School was a private coeducational boarding and day school until it was bought by Reigate Grammar School and became RGS Surrey Hills in 2025. It was situated in the village of Mickleham near Dorking, Surrey, England. Fees for day pupils started at £27,162 per year, and full boarding fees at £45,204 per year. The school was a founding member of the Round Square Conference of Schools, as well as being a member of the Headmasters' and Headmistresses' Conference.