IL
- IL – (s) Illinois (postal symbol) – Israel (ISO 3166 digram)
- ILC – (i) International Law Commission – International Linear Collider
- ILDS – (i) Improved Landmine Detection System
- ile – (s) Interlingue language (ISO 639-2 code)
- ILO – (i) International Labour Organization
- ILRI – (i) International Livestock Research Institute
- ILS – (s) Israeli shekel (ISO 4217 currency code)
- ILY – (s) IATA code for Islay Airport (Scotland), (i) I Love You
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