L1 users: 63,000 (2001 census). Total users in all countries: 71,000.
Assam state: Goalpara, and Nagaon districts; Meghalaya state: West Garo Hills district, west side; West and East Khasi hills districts; Arunachal Pradesh and West Bengal states.
Banai, Dalu. No prestige or standard dialect recognized. Intelligible with Hajong of Bangladesh. Lexical similarity: 82%–91% between Banai dialect of Koch [kdq] and mainstream Hajong varieties, 74%–77% between Dalu dialect and mainstream Hajong varieties, 79% between Banai dialect of Koch [kdq] and Dalu, 54%–64% with Assamese [asm], 63%–67% with Bengali [ben], 74%–85% with Hajong of Bangladesh.
A Scheduled Tribe. Jharua may be an alternate name. Though linguistically different, the Banai affiliate themselves with the Koch. Traditional religion, Hindu.