East Siang is a district located in the state of Arunachal Pradesh in India. It is situated in the eastern part of the state and is bordered by the Siang River on its west. The district headquarters is Pasighat, which is also the oldest town in Arunachal Pradesh.

East Siang district is known for its scenic beauty and rich cultural heritage. The major tribes residing in the district are Adi, Idu Mishmi, and Mishing. These tribes have their own distinct languages, traditions, and customs.