Hardenhuish School (formerly Chippenham Grammar School and Chippenham Girls' High School) is a large mixed secondary school and sixth form in Chippenham, Wiltshire, for students aged 11 to 18. Since September 2010, it has been an Academy. It is one of three in Chippenham, the others being Abbeyfield and Sheldon. The school is headed by Lisa Percy. It is situated in the northern zone of Hardenhuish Park on the Hardenhuish Lane. The Great Western Ambulance Service HQ is nearby to the east, and Sheldon School nearby to the south.
In 2015 Hardenhuish was mentioned in Tatler magazine's list of secondary schools to send your children to.
The main school building is the former Hardenhuish House. It is Grade II* listed for its architectural merit.