Crompton Moor (archaically known as High Moor) is an area of moorland in the South Pennines, in North West England. It lies along the northeastern outskirts of Shaw and Crompton, in the Metropolitan Borough of Oldham, Greater Manchester. Spanning approximately 160 acres (65 ha), and reaching an elevation of 1,282 feet (391 m) at Crow Knowl, Crompton Moor is one of the largest open spaces run by Oldham Countryside Service. It is a registered common of Greater Manchester, and a Site of Biological Importance since 2003.