Glenthorne is a geological site of interest within Exmoor Park, England.
Glenthorne may also refer to:
Glenthorne Estate, in the Adelaide suburb of O'Halloran Hill, South Australia
Glenthorne High School, Sutton, England
Glenthorne National Park–Ityamaiitpinna Yarta, a national park in South Australia
Glenthorne, New South Wales, in the Mid-Coast Council local government area, Australia
Glenthorne Youth Treatment Centre, a former youth detention centre in Birches Green, Birmingham, England