Purnia

Purnia (also romanized as Purnea) is a city that serves as the administrative headquarters of both Purnia district and Purnia division in the Indian state of Bihar. It is the largest city in northeastern Bihar. It is nearly 300 kilometres from Patna, the capital of Bihar, as well as 171 km from Siliguri, 92 km from Bhagalpur, and 214 km from Muzaffarpur. It is 450 km from Kolkata, the capital of the adjacent state of West Bengal and the largest city in East India.

The Indian Army, Indian Air Force, and three of five branches of India's Central Armed Police Forces – the Border Security Force (BSF), the Sashastra Seema Bal (SSB), and the Indo-Tibetan Border Police (ITBP) – have bases around the district.