Words by letter I
- International agreements
- International Court of Justice, ICJ
- International Criminal Court, ICC
- Internationale Handelsgesellschaft and Simmenthal cases
- Interpol
- Interreg
- Intervention prices
- Investiture
- Ioannina compromise
- Ireland
- IRI Europe
- Irish assurances, see Irish declaration
- Irish declaration
- Irish guarantees, see Irish declaration
- Isoglucose case