INL may refer to:
Organisations:
- Bureau for International Narcotics and Law Enforcement Affairs, US
- Falls International Airport (IATA Code: INL) in International Falls, Minnesota
- Idaho National Laboratory
- Independent Newspapers, a New Zealand company
- Indian National League, a Muslim-based political party
- International Iberian Nanotechnology Laboratory
- Institut des nanotechnologies de Lyon, a research institute in Lyon, France
Other:
- Inner nuclear layer, a layer of the retina
- Integral nonlinearity, electrical engineering, a measure of digital-to-analog converter or analog-to-digital converter accuracy
- Inter-National League, an ice-hockey league