According to Norman Tindale's estimation, the Gamilaraay's tribal domains encompassed some 29000 sqmi , from around Singleton in the Hunter Valley through to the Warrumbungle Mountains in the west and up through the present-day centres of Quirindi, Gunnedah, Tamworth, Narrabri, Walgett, Moree, Collarenebri, Lightning Ridge and Mungindi in New South Wales, to Nindigully in south west Queensland.