Tunney is a gazetted townsite located along the Albany Highway between Kojonup and Cranbrook, in the Shire of Cranbrook and Shire of Broomehill-Tambellup in the Great Southern region of Western Australia. The Albany Highway forms the shire boundary in this area and the area of the townsite of Tunney spans either side of the highway. Because of its location across two shires, Tunney has two postcodes, 6320 for the eastern part, located in Broomehill-Tambellup, and 6321 for the western part, located in Cranbrook.