According to the 2011 census of India, Mpai has 174 households. The effective literacy rate (i.e. the literacy rate of population excluding children aged 6 and below) is 63.11%.[2]
Demographics (2011 Census)[2]
| Total | Male | Female |
| Population | 693 | 355 | 338 |
| Children aged below 6 years | 159 | 86 | 73 |
| Scheduled caste | 0 | 0 | 0 |
| Scheduled tribe | 693 | 355 | 338 |
| Literates | 337 | 202 | 135 |
| Workers (all) | 374 | 188 | 186 |
| Main workers (total) | 280 | 141 | 139 |
| Main workers: Cultivators | 260 | 126 | 134 |
| Main workers: Agricultural labourers | 1 | 1 | 0 |
| Main workers: Household industry workers | 2 | 1 | 1 |
| Main workers: Other | 17 | 13 | 4 |
| Marginal workers (total) | 94 | 47 | 47 |
| Marginal workers: Cultivators | 45 | 20 | 25 |
| Marginal workers: Agricultural labourers | 3 | 3 | 0 |
| Marginal workers: Household industry workers | 5 | 2 | 3 |
| Marginal workers: Others | 41 | 22 | 19 |
| Non-workers | 319 | 167 | 152 |