Eil is the name of several places:
- Loch Eil, a lake in Scotland
- Eil, Somalia
- Eil (crater), on Mars
- Eil, Cologne, a quarter of Cologne, Germany
- El (god), an alternative spelling for the Hebrew אל, ("God"), usually written 'El'
EIL can be an acronym for:
- Eastern Independent League, a Boston-area conference for local private day-schools
- Energy input labeling
- Engineers India Limited
- Eurostar International Limited
- Experiment in International Living
- English as an International Language, a term within English language learning and teaching