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.

Lumbini Province is a province in western Nepal. The country's third largest province in terms of area as well as population, Lumbini is home to the World Heritage Site of Lumbini, where according to the Buddhist tradition, the founder of Buddhism, Gautama Buddha was born.