ICCC is a four-character abbreviation with multiple meanings:
- several societies of Imperial College Union
- International C-Class Catamaran Championship, a match racing series for C-Class catamarans (under sail), held annually
- International Classification of Childhood Cancer, a standardized system for categorizing childhood malignancies
- International Conference on Climate Change, an annual conference of global warming deniers
- International Conference on Computational Creativity
- International Conference on Computer Communications
- International Council of Christian Churches
- International Council of Community Churches
- Italian Cultural and Community Center at the Logue House in Houston, Texas
- Iowa Central Community College