Arghakhanchi is one of the districts of Lumbini Zone. The Zone lies in the Western (Pashchimanchal) Region of Nepal. Its neighboring districts are, Palpa in the east, Gulmi in the North, Kapilbastu and Rupandehi in the south and Dang and Pyuthan in the west. About 68% of the total area in here lies in the Mahabharat Range, and the remaining lies in the Siwalik Region. The district is famous for its local deities like Supa Deurali Bhagwati, Argha MahaKali Temple and Chetradev. Other places of historical importance are Argha Durbar, Khanchi Rajsthal, Narpani, Kissankot, and Ranipokhari. Situated between 305m-2575m above sea level, about 40% of its total area is covered by forest.
The district is situated between 27'45"N to 28'6" N and 80'45" E to 83'23"E.The district covers a total of 1,193 km² area. It is bound by Palpa in the east, Gulmi in the north, Kapilbastu and Rupandehi districts in the south and Dang and Pyuthan in the west. 68% of its landscape is located in Mahabharat range and 32 % is located in Siwalik region.
The major rivers of the district are Bangikhola,Bangsari Khola, Mathurabesi Khola, Banganga Khola, Durgakhola, Sitakhola, Khakabesi Khola, Rangsing Khola, Ratne Khola, Jhimruk Khola, Khankbesi Khola etc.. The major lakes of the district are Thada lake and Sengleng lake.