BNI may refer to:
- BNI (organization), a worldwide business referral organisation
- Bank Negara Indonesia
- Britten Norman Islander, a two engine aircraft
- Bureau of National Investigations, the secret police of Ghana
- Burlington Northern Santa Fe Corporation, NYSE ticker code
- Nikolassee railway station, DB station code
- Benin Airport, IATA code
- Barrow Neurological Institute, famous Neurosurgical Institute in Phoenix, AZ
- Bankruptcy Navigator Index