West Siang district is one of the administrative districts in the state of Arunachal Pradesh, India. Located in the northeastern part of the country, West Siang is bordered by the Indian state of Assam to the south and shares international borders with Bhutan to the west and China to the north. The district headquarters is located in the town of Along.

West Siang district is known for its scenic beauty and diverse cultural heritage. The region is blessed with abundant natural resources, including lush green forests, rivers, and picturesque valleys. The mighty Siang River, one of the major tributaries of the Brahmaputra River, flows through the district, adding to its natural charm.