Costello is a locality in the Northern Territory of Australia located in the territory's east adjoining the border with the state of Queensland about 1,057 kilometres (657 mi) south-east of the territory capital of Darwin. The locality consists of the following land (from north to south, then west to east): 1. * The Wakaya Aboriginal Lands Trust and land described as NT Portion 4246 2. * The Arruwurra Aboriginal Corporation, NT Portions 4247, 581, 1094 and 1095, and the Argadargada pastoral lease and, 3. * The Georgina Downs and Lake Nash pastoral leases