Bordumsa-Diyun (Vidhan Sabha constituency)

Bordumsa and Diyun are towns in the Indian state of Arunachal Pradesh. Changlang is the name of the district that contains Bordumsa and Diyun towns. Bordumsa and Diyun are revenue circles and together constitute 49th Arunachal Pradesh State legislative Assembly Constituency.
Bordumsa-Diyun is one of the 60 constituencies of Legislative Assembly of Arunachal Pradesh and also the only unreserved constituency in the State's Vidhan Sabha. The current MLA of this constituency is Somlung Mossang, who is an independent candidate.