The Wadjabangai, otherwise known as Wadjabangayi, were an indigenous Australian people of Queensland.
Wadjabangai was closely related to Bidjara.
Norman Tindale estimated Wadjabangai lands at 3,200 square miles (8,300 km2) of sandy plains with ample tree stands. he arrived at this figure by exclusion from the known range of contiguous tribal territories whose domain borders are better known. The Wadjabangai lived in the area south of Lancevale, including Maryvale and as far as Blackall.