The Shire of Northern Grampians is a local government area in the Wimmera region of Victoria, Australia, located in the western part of the state. It covers an area of 5,918 square kilometres (2,285 sq mi) and, at the 2011 Census, had a population of 11,845. It includes the towns of Stawell, St Arnaud, Great Western, Marnoo, Glenorchy, Stuart Mill, Navarre and the tourist town of Halls Gap.