300 (Wurm 2000).
Sandaun Province, near Sera and Sissano coast, northwest peninsula of Sissano Lagoon, around Sumo and Ramu towns.
Endangered or seriously endangered (2000 S. Wurm). Language use was vigorous before the 1998 tsunami which annihilated much of the population. Perhaps seriously endangered in view of the scattered nature of the surviving Warapu speakers (Wurm 2007).