| Berainak | |
| Other Name: | Badnak, Bada Inak |
| Settlement Type: | village |
| Pushpin Map: | India Andaman and Nicobar Islands#India |
| Pushpin Map Caption: | Location in Andaman and Nicobar Islands, India |
| Coordinates: | 8.1194°N 93.5139°W |
| Subdivision Type: | Country |
| Subdivision Name: | India |
| Subdivision Type1: | State |
| Subdivision Name1: | Andaman and Nicobar Islands |
| Subdivision Type2: | District |
| Subdivision Name2: | Nicobar |
| Subdivision Type3: | Tehsil |
| Subdivision Name3: | Nancowry |
| Seat Type: | Panchayat |
| Unit Pref: | Metric |
| Population As Of: | 2011 |
| Population Total: | 188 |
| Population Density Km2: | auto |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Blank Name Sec1: | Census code |
| Blank Info Sec1: | 645129 |
Berainak or Badnak is a village in the Nicobar district of Andaman and Nicobar Islands, India. It is located in the Nancowry tehsil.[1] The name is also spelt as "Bada Inak" ("Greater Inak"; contrasted with Chota Inak or "Little Inak").
According to the 2011 census of India, Berainak/Badnak has 38 households. The effective literacy rate (i.e. the literacy rate of population excluding children aged 6 and below) is 64.38%.
| Population | 188 | 107 | 81 | |
| Children aged below 6 years | 28 | 11 | 17 | |
| 0 | 0 | 0 | ||
| 153 | 75 | 78 | ||
| Literates | 103 | 65 | 38 | |
| Workers (all) | 69 | 59 | 10 | |
| Main workers (total) | 34 | 34 | 0 | |
| Main workers: Cultivators | 0 | 0 | 0 | |
| Main workers: Agricultural labourers | 0 | 0 | 0 | |
| Main workers: Household industry workers | 0 | 0 | 0 | |
| Main workers: Other | 34 | 34 | 0 | |
| Marginal workers (total) | 35 | 25 | 10 | |
| Marginal workers: Cultivators | 2 | 2 | 0 | |
| Marginal workers: Agricultural labourers | 1 | 1 | 0 | |
| Marginal workers: Household industry workers | 0 | 0 | 0 | |
| Marginal workers: Others | 32 | 22 | 10 | |
| Non-workers | 119 | 48 | 71 |