Merredin is a town in Western Australia, located in the central Wheatbelt roughly midway between Perth and Kalgoorlie, on Route 94, Great Eastern Highway. It is located on the route of the Goldfields Water Supply Scheme, and as a result is also on the Golden Pipeline Heritage Trail.

The Wheatbelt is one of nine regions of Western Australia defined as administrative areas for the state's regional development, and a vernacular term for the area converted to agriculture during colonisation. It partially surrounds the Perth metropolitan area, extending north from Perth to the Mid West region, and east to the Goldfields–Esperance region. It is bordered to the south by the South West and Great Southern regions, and to the west by the Indian Ocean, the Perth metropolitan area, and the Peel region. Altogether, it has an area of 154,862 square kilometres (59,793 sq mi).