Saffron Walden Free Grammar School (or Saffron Walden Grammar School) was a school in the Essex town of Saffron Walden, which for over four hundred years educated the boys of the town and surrounding villages in a manner designed to be after the model of Eton College and Winchester.

Lady Joan was the wife of London's Lord Mayor Thomas Bradbury (d.1510); her brother, John Leche, was the Rector of Saffron Walden.

"[1] In some histories, the school is deemed the successor of the 1423 establishment and thus has been described as having been refounded by Edward VI.

The school bore the Tudor royal arms[2] The original building, designed for 60 pupils, flanked the churchyard wall.

During World War II the 8th Air Force's 65th fighter wing (which was assigned the additional duty of Air Sea Rescue) had its fighter control center in the building because of its proximity to Debden airfield.