The Gascoyne region is one of the nine regions of Western Australia. It is located in the northwest of Western Australia, and consists of the local government areas of Carnarvon, Exmouth, Shark Bay and Upper Gascoyne. The Gascoyne has about 600 kilometres (370 mi) of Indian Ocean coastline; extends inland about 500 kilometres (310 mi); and has an area of 135,073.8 square kilometres (52,152.3 sq mi), including islands.

The Goldfields–Esperance region is one of the nine regions of Western Australia. It is located in the south-eastern corner of Western Australia, and comprises the local government areas of Coolgardie, Dundas, Esperance, Kalgoorlie–Boulder, Laverton, Leonora, Menzies, Ngaanyatjarraku, Ravensthorpe and Wiluna. It also incorporates the area along the Great Australian Bight to the South Australian border known as the Nullarbor Plain.

The Great Southern region is one of the nine regions of Western Australia, as defined by the Regional Development Commissions Act 1993, for the purposes of economic development. It is a section of the larger south coast of Western Australia and neighbouring agricultural regions. The region officially comprises the local government areas of Albany, Broomehill-Tambellup, Cranbrook, Denmark, Gnowangerup, Jerramungup, Katanning, Kent, Kojonup, Plantagenet, and Woodanilling.

The Mid West region is one of the nine regions of Western Australia. It is a sparsely populated region extending from the west coast of Western Australia, about 200 kilometres (120 mi) north and south of its administrative centre of Geraldton and inland to 450 kilometres (280 mi) east of Wiluna in the Gibson Desert. It has a total area of 285,497 square kilometres (110,231 sq mi), and a permanent population of about 54,000 people, more than half of those in Geraldton.

Peel is one of the nine regions of Western Australia, as defined by the Regional Development Commissions Act 1993. It is located on the west coast of Western Australia, about 75 kilometres (47 mi) south of the state capital, Perth. It consists of the City of Mandurah, and the Shires of Boddington, Murray, Serpentine-Jarrahdale and Waroona. The total area of the region is 6,648 square kilometres (2,567 sq mi).In 2017, Peel had a population of 136,854, of which over sixty percent lived in Mandurah. In June 2019 the total population for the constituent Local Government Areas (LGAs) was 142,960, within an area of 5,516.3 square kilometres (2,129.9 sq mi).

Perth (Nyungar: Boorloo) is the capital and largest city of the state of Western Australia. It is the fourth-most-populous city in Australia, with a population of over 2.2 million in the city and 2.3 million within Greater Perth as of 2023. The world's most isolated major city by certain criteria, Perth is part of the South West Land Division of Western Australia, with most of Perth's metropolitan area on the Swan Coastal Plain between the Indian Ocean and the Darling Scarp. The city has expanded outward from the original British settlements on the Swan River, upon which its central business district and port of Fremantle are situated.

The South West region is one of the nine regions of Western Australia. It has an area of 23,970 square kilometres (9,250 sq mi), and a population of about 170,000 people. Bunbury is the main city in the region. It includes the towns of Busselto, Dunsborough, Yallingup, Margaret River, Hamlin Bay and Augusta

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.[a] 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) (including islands). The region has 42 local government authorities, with an estimated population of 75,000 residents. The Wheatbelt accounts for approximately three per cent of Western Australia's population