Bagaha is a city as well as a municipality in Pashchim Champaran district in the state of Bihar in India. The exact location of this town is 24.53° North and 85.03° East. It is at a distance of 135 metres (442 feet) from the ground level and is situated on the banks of the river Gandak According to the 2001 India census; Bagaha has a population of 91,383. The population is composed of 53% males and 47% females. The city has an average literacy rate of 38%, quite lower than the national average of 59.5%. 66% of the males and 34% of the females are literate. Children below six years of age make up 19% of the population. This small town is positioned at the meeting point of Bihar, Uttar pradesh and Nepal.The region is very productive owing to its location in the terai of the Himalayas.The major crops grown here are wheat, paddy and sugarcane.

Bagaha and the regions close to it are full of scenic beauty and historical significance. Around 10 km from Bagaha is the Valmikinagar wildlife sanctuary. The forest is full of subtropical trees like sal, sagwan, bamboo and cane and is home to animals like the royal bengal tiger, black bear, python, leopard and many species of deer and birds. About 35 km. from Bagaha is the small village of Valmikinagar, a place of strategic as well as legendary importance. It is believed that this was the place where Sita resided with her two sons after being banished from Ayodhya by Lord Rama. From the point where Valmikinagar ends, Nepal starts and there is a big barrage on the Gandak River, which acts as the border between the two countries. The forest region has many old temples of religious significance. The Valmikinagar forest has been registered under tiger reserved project.