Calday Grange Grammar School (abbreviated to CGGS; also known as Calday Grange, Calday Grammar or simply Calday due to the difference in spelling to the nearby village of Caldy) is a non-denominational, academically selective grammar school, founded in 1636, situated on Caldy Hill in Grange, a suburb of West Kirby on the Wirral peninsula, England. The school admits boys from age 11 to 18 and, since 1985, girls for the sixth form only. The school has academy status, hosts the Wirral Able Children Centre, and has been awarded Sportsmark Gold and Investors in People status.