Zamindawar is a historical region of Afghanistan. It is a very large and fertile valley the main sources for irrigation is the Helmand River. Zamindawar is located in the greater territory of northern Helmand and encompasses the approximate area of modern-day Baghran, Musa Qala, Naw Zad, Kajaki and Sangin districts. It was a district of hills, and of wide, well populated, and fertile valleys watered by important tributaries of the Helmand. The principal town was Musa Qala, which stands on the banks of a river of the same name, about 60 km north of the city of Grishk.
This region was headquarters to the Durrani Pashtun tribe of the Alizai. The region is also home to Nurzai, Barakzai and Alakozai tribes, as well as other Durrani tribes and Kuchis. It was from Zamindawar that much of the strength of the force which besieged Kandahar under Mohammad Ayub Khan in 1880 was derived; and it was the Zamindawar contingent of tribesmen who so nearly defeated Sir Donald Stewart's force at the Battle of Ahmed Khel previously. The control of Zamindawar was regarded by the British-Indian forces as the key to the position for safeguarding the route between Herat and Kandahar during the Second Anglo-Afghan War.
Zunbils ruled Zamindawar before Islamization of the area. The title Zunbil can be traced back to the Middle-Persian original Zūn-dātbar, "Zun the Justice-giver". The geographical name Zamindawar would also reflect this, from Middle-Persian Zamin-i dātbar (Land of the Justice-giver).
According to author André Wink,
In southern and eastern Afghanistan, the regions of Zamindawar (Zamin I Datbar or land of the justice giver, the classical Archosia) and Zabulistan or Zabul (Jabala, Kapisha, Kia pi shi) and Kabul, the Arabs were effectively opposed for more than two centuries, from 643 to 870 AD, by the indigenous rulers the Zunbils and the related Kabul-Shahs of the dynasty which became known as the Buddhist-Shahi. With Makran and Baluchistan and much of Sindh this area can be reckoned to belong to the cultural and political frontier zone between India and Persia.