Katherine is a town in the Northern Territory of Australia. It is situated on the Katherine River, after which it is named, 320 kilometres southeas…Katherine is a town in the Northern Territory of Australia. It is situated on the Katherine River, after which it is named, 320 kilometres southeast of Darwin. The fourth largest settlement in the Territory, it is known as the place where "The outback meets the tropics". Katherine had an urban population of 5,980 at the 2021 Australia Census.