The Gnaala Karla Booja region refers to the Noongar language or dialectical groups of the Binjareb/Pinjarup, Wilman and Ganeang. Towards the east of the Gnaala Karla Booja region is the Balladong region and down south is the Wagyl Kaip region.
The Gnaala Karla Booja region encompasses the towns of Capel, Donnybrook, Balingup, Wickepin, Narrogin, Williams, Mundijong, Kwinana, Brookton, Pingelly, Wagin, Harvey, Collie, Pinjarra, Mandurah and Boddington.