Pil or PIL may refer to:
- Pil, Iran, a village in Mazandaran Province, Iran
- Pil (chess), or alfil, a fairy chess piece
- Pil (placename) a Welsh placename element
- Carlos Miguel Jiménez Airport (IATA Code: PIL), in Pilar, Paraguay
- Port Isabel-Cameron County Airport (FAA Code: PIL), in Port Isabel, Texas
- Pacific International Lines, a Singapore-based shipping company
- Page Interchange Language
- Patient information leaflet
- Pilning railway station (National Rail station code: PIL), in South Gloucestershire, England
- Portland Interscholastic League, a high school athletic conference in Oregon
- Poslednja Igra Leptira, a former Yugoslavian pop rock band
- Protic ionic liquid
- Public Image Ltd, an English post-punk band
- Public interest litigation in India
- Python Imaging Library
- Old Style Pilsner, often known as Pil