Dasu or Dassu is the district headquarters of Upper Kohistan District, Khyber Pakhtunkhwa, Pakistan. It had 15 Union Councils before the separation of the Kandia valley. Since it’s being named as Tehsil, the Dasu subdivision has 11 Union Councils. The total population of Dasu according to 1998 Census was 137,519, in 21,487 households. Abasin Kohistani (Maiya) is the main language natively spoken in the Dasu town. Pashto and Urdu are also used.