Huddersfield Grammar School is a coeducational independent school located in Huddersfield in West Yorkshire, England. The school was established in 1995 on the site of the former independent St David's School (Huddersfield), which closed on 1 September 1995. St David's school had been purchased and merged with the former independent Kayes College in 1995. Since 2007 the school has been owned and operated by the Cognita Group. In 2014, Cognita invested £3.5 million at Huddersfield Grammar School to improve the school's site and facilities.