Kabenau River (also Gabina or St. Augustin River) is a river in Madang Province, Papua New Guinea. It is located at about 5.466667°S 145.85°E. It was discovered in 1887 by geologist C. Schneider and explored in 1888 by Hugo Zöller. It flows westward and empties near Rimba to the Astrolabe Bay.