| Bairoi | |
| Settlement Type: | Town |
| Pushpin Map: | India Odisha |
| Coordinates: | 20.2393°N 85.9866°W |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Name1: | Orissa |
| Subdivision Type2: | District |
| Subdivision Name2: | Cuttack |
| Established Title: | Established |
| Government Type: | Panchayat |
| Leader Title: | Sarpanch |
| Unit Pref: | Metric |
| Population Total: | 50,000 |
| Population As Of: | 2011 |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Hindu |
| Demographics2 Title1: | Other |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 754010 |
Bairoi (Olatpur) is a town situated 17 km from Phul Nakhara and 30 km from Cuttack and Bhubaneswar in Orissa, India. It is the birthplace of Ramakrushna Nanda, the grandfather of Manoranjan Nanda, a writer and social worker.
Bairoi has a population of 50,000 including males and females. Bairoi has an average literacy rate of 85%.