| Country Population: | 51,000 |
| States: | 11 |
| Districts: | 76 |
| Primary Language: | Koch |
| Primary Religion: | Hinduism |

| State ▲ | District | Primary Language | Population | Hindu | Muslim | Buddhist | Christian | Sikh | Other |
|---|---|---|---|---|---|---|---|---|---|
| Andaman and Nicobar Islands | Andaman, South | Bengali | 100 | 100 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Andaman and Nicobar Islands | North and Middle Andaman | Bengali | 70 | 70 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Assam | Charaideo | Rajbanshi | 90 | 90 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Assam | Darrang | Rajbanshi | 60 | 60 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Assam | Dhubri | Koch | 40 | 40 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Assam | Hojai | Rajbanshi | 200 | 200 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Assam | Lakhimpur | Bengali | 200 | 200 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Assam | Nagaon | Rajbanshi | 300 | 300 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Assam | Salmara-Mankachar, South | Koch | 20 | 20 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Assam | Sivasagar | Rajbanshi | 100 | 100 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Assam | Udalguri | Rajbanshi | 80 | 80 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Bihar | Araria | Maithili | 2,100 | 2,100 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Bihar | Katihar | Rajbanshi | 2,300 | 2,300 | -1 - | -1 - | -1 - | -1 - | 20 |
| Bihar | Kishanganj | Koch | 800 | 800 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Bihar | Purnia | Rajbanshi | 2,600 | 2,500 | -1 - | -1 - | -1 - | -1 - | 20 |
| Delhi | Delhi, Central | Bengali | 20 | 20 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Delhi | Delhi, East | Bengali | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| Delhi | Delhi, North | Bengali | 20 | 20 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Delhi | Delhi, Northeast | Bengali | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| Delhi | Delhi, Northwest | Bengali | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| Delhi | Delhi, South | Bengali | 20 | 20 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Delhi | Delhi, South East | Bengali | 20 | 20 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Delhi | Delhi, Southwest | Koch | 30 | 30 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Delhi | Delhi, West | Bengali | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| Jharkhand | Dumka | Bengali | 30 | 30 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Jharkhand | Jamtara | Bengali | 40 | 40 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Jharkhand | Pakur | Koch | 20 | 20 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Jharkhand | Sahibganj | Koch | 80 | 80 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Maharashtra | Chandrapur | Koch | 50 | 50 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Maharashtra | Mumbai City | Koch | 20 | 20 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Maharashtra | Mumbai suburban | Koch | 40 | 40 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Maharashtra | Nagpur | Koch | 100 | 100 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Meghalaya | Garo Hills, East | Koch | 60 | 40 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Meghalaya | Garo Hills, North | Koch | 90 | 80 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Meghalaya | Garo Hills, South | Koch | 1,200 | 1,200 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Meghalaya | Garo Hills, Southwest | Nepali | 4,900 | 4,800 | -1 - | -1 - | 100 | -1 - | -1 - |
| Meghalaya | Garo Hills, West | Koch | 21,000 | 21,000 | -1 - | -1 - | 100 | -1 - | 30 |
| Meghalaya | Khasi Hills, East | Koch | 500 | 400 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Meghalaya | Khasi Hills, Southwest | Khasi | 40 | 30 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Meghalaya | Khasi Hills, West | Koch | 40 | -1 - | -1 - | -1 - | 20 | -1 - | -1 - |
| Meghalaya | Ri Bhoi | Koch | 40 | 40 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Odisha | Balasore | Bengali | 20 | 20 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Odisha | Bhadrak | Bengali | 40 | 40 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Odisha | Cuttack | Bengali | 20 | 20 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Odisha | Jagatsinghpur | Bengali | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| Odisha | Jajpur | Bengali | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| Odisha | Kendrapara | Bengali | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| Odisha | Kendujhar (Keonjhar) | Bengali | 30 | 30 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Odisha | Khordha | Bengali | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| Odisha | Puri | Bengali | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| Odisha | Sundargarh | Koch | 60 | 60 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Tripura | Khowai | Bengali | 200 | 200 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Tripura | Sepahijala | Bengali | 200 | 200 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Tripura | Tripura, North | Bengali | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| Tripura | Tripura, West | Bengali | 400 | 400 | -1 - | -1 - | -1 - | -1 - | -1 - |
| Uttar Pradesh | Chandauli | Koch | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| Uttar Pradesh | Siddharthnagar | Koch | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Alipurduar | Koch | 70 | 70 | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Bankura | Bengali | 30 | -1 - | -1 - | -1 - | -1 - | -1 - | 20 |
| West Bengal | Birbhum | Bengali | 40 | 40 | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Cooch Behar | Bengali | 1,100 | 1,100 | -1 - | -1 - | -1 - | -1 - | 20 |
| West Bengal | Dakshin Dinajpur | Bengali | 1,200 | 1,200 | -1 - | -1 - | -1 - | -1 - | 70 |
| West Bengal | Darjeeling | Rajbanshi | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Hooghly | Bengali | 30 | 30 | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Jalpaiguri | Koch | 100 | 100 | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Kolkata | Bengali | 40 | 40 | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Maldah | Bengali | 8,000 | 8,000 | -1 - | -1 - | -1 - | -1 - | 40 |
| West Bengal | Murshidabad | Bengali | 200 | 200 | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Nadia | Bengali | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | North 24 Parganas | Bengali | 30 | 30 | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Paschim Bardhaman | Bengali | 20 | 20 | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Paschim Medinipur | Bengali | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Purba Bardhaman | Bengali | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Purba Medinipur | Bengali | -1 Unknown | -1 - | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | South 24 Parganas | Bengali | 20 | 20 | -1 - | -1 - | -1 - | -1 - | -1 - |
| West Bengal | Uttar Dinajpur | Bengali | 1,400 | 1,400 | -1 - | -1 - | -1 - | -1 - | 30 |
| States | Districts | Languages | Population | Hindu | Muslim | Buddhist | Christian | Sikh | Other |
| 11 | 76 | 6 | 51,000 | 51,000 | 0 | 20 | 300 | 0 | 300 |