Regions included: Sitamarhi, Madhubani, Supaul, Ararai, Kishenganj, Purnia, Katihar, Madhepura, Saharsa, Darbhanga, Samastipur, Begusarai, Khagaria districts of bihar
Population (2011): 3.5 crores
Area: 40000 sq KM
Note: Maithili is a language spoken by people of north-eastern Bihar and some districts in Nepal. This area has a distinct identity throughout the history. Even Indian constitution recognize Maithili. Angika is another language spoken in this area. But number of speakers of Angika are too small to form a viable state. So in my opinion a state out of Maithili and Angika speaking regions should be formed.