Millais School is a girls' secondary school for students aged 11–16 in Horsham, West Sussex, England. There is no sixth form. The number on roll is over 1500. In 2011 the school became a National Teaching School. The school's catchment area serves Horsham and the villages bordering the town. The Headteacher is Dr. Alison Lodwick. Elizabeth Barnes is the Chairman of Governors.