C
- Caird, Edward
- Calvin, John
- Camus, Albert
- Care Ethics
- Carnap, Rudolf
- Carneades
- Castoriadis, Cornelius
- Causation, Hume on
- Chang Tsai (Zhang Zai)
- Cheng Hao (Cheng Mingdao)
- Cheng Yi
- Chinese Philosophy, Modern
- Chinese Room Argument
- Christian Philosophy: The 1930s French Debates
- Chrysippus
- Chu Hsi (Zhu Xi)
- Chuang-Tzu (Zhuangzi)
- Chung Hui (Zhong Hui)
- Cicero
- Cleanthes
- Cloning
- Cognition, Embodied
- Cognitive Relativism
- Coherentism in Epistemology
- Collective Intentionality
- Collective Moral Responsibility
- Color
- Comparative Philosophy
- Concepts
- Conceptual Role Semantics
- Confirmation and Induction
- Confucius
- Confucian Philosophy: Neo-Confucian Philosophy
- Connectionism
- Consciousness
- Consciousness, Hard Problem of
- Consciousness, Higher-Order Theories of
- Consequentialism
- Constructive Mathematics
- Contextualism in Epistemology
- Critias
- Critical Rationalism, Karl Popper and
- Critical Theory and the Frankfurt School
- Cudworth, Ralph
- Cumberland, Richard
- Cynics
- Cyrenaics
