Koshi District is located in the eastern part of Nepal, known for its diverse geography and rich culture. It is part of the Koshi Zone and is bordered by the Sunsari District to the west and the Udayapur District to the south. The district features a mix of hills and plains, making it a unique area for agriculture and settlement. The district is home to several important towns, including Biratnagar, which is one of the largest cities in Nepal. Koshi District is also known for the Koshi River, a significant waterway that supports local agriculture and provides irrigation. The region is culturally diverse, with various ethnic groups contributing to its vibrant community.