Caulfield Grammar School is a private, co-educational, Anglican, International Baccalaureate, day and boarding school, located in Melbourne, Victoria, Australia. Founded in 1881 as a boys' school, Caulfield Grammar began admitting girls exactly one hundred years later. The school amalgamated with Malvern Memorial Grammar School (MMGS) in 1961, with the MMGS campus becoming Malvern Campus.

Caulfield Grammar has three-day campuses in Victoria, Caulfield (Years 7–12), Wheelers Hill (K–Year 12), and Malvern House (K–Year 6). It has an outdoor education campus at Yarra Junction, and a student centre in Nanjing, China where the Year 9 internationalism programme is conducted. Caulfield Grammar is the second largest school in Victoria, currently catering for 3,315 students.