Rupandehi Districtरुपन्देही जिल्ला

Rupandehi runs from the foot of the Churia hills at Butwal, where the Tinau river breaks onto the plain, across 1,360 km² of Tarai farmland to the Belahiya–Sunauli crossing into India, one of Nepal's busiest border points. It is the demographic engine of the province: the 2021 census counted 1,121,957 people — only Kathmandu and Morang counted more — up from 880,196 in 2011, an annual growth rate of 2.33% that is the fastest of any district outside the Kathmandu Valley. Density of 825 per km² and 16 local levels, both the province's highest, complete the picture. Nepali (42.6%), Bhojpuri (31.8%), Awadhi (10.1%) and Tharu (7.3%) are the main first languages of a thoroughly mixed hill-and-plains population.

The Butwal–Bhairahawa corridor is one of Nepal's principal industrial and commercial belts. Butwal, a sub-metropolitan city at the junction of the East–West and Siddhartha highways, anchors trade between the western hills and the plains and served as Lumbini Province's capital until the government moved to Deukhuri in December 2022; Tilottama, between the two cities, is among the country's fastest-growing municipalities; and the headquarters Siddharthanagar (Bhairahawa) handles border commerce, a special economic zone and Gautam Buddha International Airport — Nepal's second international airport, opened in 2022 to bring pilgrims directly to the Buddhist circuit.

The district's world significance rests on Lumbini, in Lumbini Sanskritik Municipality, where the Buddha was born in 623 BC according to the inscription on the pillar erected by Emperor Ashoka in 249 BC. Centred on the Maya Devi temple, the marker stone and the sacred pond beside the Ashokan pillar, the site — developed under the master plan drawn up by Japanese architect Kenzō Tange — was inscribed on the UNESCO World Heritage List in 1997 and is ringed by monasteries built by Buddhist nations from across Asia. East of Butwal, Devdaha is revered as the home town of Maya Devi, the Buddha's mother, capital of the ancient Koliya republic.