| State ▲ | District | Primary Language | Population | Hindu | Muslim | Buddhist | Christian | Sikh | Other |
|---|---|---|---|---|---|---|---|---|---|
| Bihar | Araria | Maithili | 1,000 | 700 | -1 - | -1 - | -1 - | 20 | 300 |
| Bihar | Begusarai | Hindi | 40 | 40 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Bihar | Katihar | Maithili | 30 | 30 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Bihar | Kishanganj | Maithili | 200 | 100 | -1 - | -1 - | -1 - | -1 - | 60 |
| Bihar | Purnia | Maithili | 400 | 400 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Bihar | Saharsa | Maithili | 20 | 20 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Bihar | Sheohar | Hindi | 50 | 50 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Bihar | Sitamarhi | Maithili | 200 | 200 | -1 - | -1 - | -1 - | -1 - | 60 |
| Bihar | Supaul | Maithili | 20 | 20 | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Bankura | Bengali | 30 | 30 | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Birbhum | Dhimal | 30 | 30 | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Dakshin Dinajpur | Rajbanshi | 40 | 40 | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Darjeeling | Bengali | 2,800 | 2,600 | -1 - | -1 - | -1 - | -1 - | 100 |
| West Bengal | Kalimpang | Rajbanshi | 400 | 300 | -1 - | -1 - | -1 - | -1 - | 20 |
| States | Districts | Languages | Population | Hindu | Muslim | Buddhist | Christian | Sikh | Other |
| 2 | 14 | 5 | 5,200 | 4,600 | 0 | 0 | 0 | 30 | 600 |