CIL
- Almaș
- C Intermediate Language
- CIL (Casablanca)
- CIL Chen
- COFCO Group
- COFCO International Limited
- Canadian Industries Limited
- Centers for Independent Living
- Centre for International Law (CIL)
- Chicago, Indianapolis and Louisville Railway
- Christadelphian Isolation League
- Cil (singer)
- Cil, Armenia
- Cil, Azerbaijan
- Coal India Limited
- Commissioners of Irish Lights
- Common Intermediate Language
- Community Infrastructure Levy
- Corpus Inscriptionum Latinarum
- Council Airport
- Crucible Industries
- Customary international law
- International Computer and Information Literacy Study
- Option (finance)