CJC
- California Jazz Conservatory
- Canadian Jewish Congress
- Canadian Journal of Chemistry
- Canadian Judicial Council
- Catholic Junior College
- Central Johannesburg College
- Cisco Junior College
- CjC
- Codex Justinianus
- Colgan Air
- Collectives of Communist Youth
- Community of Jesus' Compassion
- Confédération des jeunes chercheurs
- Cor Jesu College
- Cornway Junior College
- Corpus Juris Civilis
- Criminal Justice Commission (Australia)
- Digest (Roman law)
- El Loa Airport
- Institutes of Justinian
- Novellae Constitutiones
- University of Florida College of Journalism and Communications
- Utah Children's Justice Center