Sandhikharka Municipality is the headquarter of Arghakhanchi District which lies in Lumbini Province of Nepal. The former village development committee (VDC) was converted into a municipality on 18 May 2014 by merging the existing Sandhikharka, Wangla, Narapani, Khanchikot, Kimadada, Argha and Dibharna VDCs. It is located, in a valley surrounded by hills, in the western part of the capital, Kathmandu.

Arghakhanchi is one of the districts of Lumbini Province in Nepal. The district headquarter is Sandhikharka. The district covers an area of 1,193 km2 (461 sq mi) and has a population (2011) of 197,632. Its neighboring districts are Palpa in the east, Gulmi in the north, Kapilvastu District in the south and Pyuthan in the west. The district also covers 4.18km of daily busy road connecting Kapilvastu and Bhalubang, Lalmatiya, Dang with Rapti River as Mahendra Highway or Easy-West Highway.