The school was founded in Ashford around 1630 as a free grammar school by its namesake who died in 1636, an uncle of
Sir Norton Knatchbull. The school continued to be led and funded by Knatchbull's family due to a stipulation in his will in 1636. It was known simply as 'Ashford Grammar School' until the summer of 1973. A new Digital Learning Centre is to be constructed on the site in order to facilitate an expected increase in the number of students attending the school as the surrounding area continues to grow. The Digital Learning Centre has since been completed in 2021. It is one of two grammar schools in
Ashford. ==Notable alumni==