| Sum: | 3,001,060 | 12 | 0.00% | |||||
| Sub-Group | Ethnic-Group | Language | Country | Population | Churches | Evangelicals | Evang % | Major Religion |
| Kalwar | Bhojpuri | Bhojpuri | India | 1,197,613 | 0% | Hinduism | ||
| Kalwar | Hindi | Hindi | India | 1,194,983 | 12 | 0% | Hinduism | |
| Kalwar | Magahi | Magahi | India | 569,727 | 0% | Hinduism | ||
| Kalwar | Maitili | Maithili | India | 38,457 | 0% | Hinduism | ||
| Kalwar | Sindhi | Sindhi | India | 280 | 0% | Hinduism |