- Calvinism
- Cartesianism
- Catastrophism
- Catholicism
- Causality, Primary and Secondary
- Causation
- Chance
- Chaos Theory
- Chaos, Quantum
- Chaos, Religious and Philosophical Aspects
- Chemistry
- Chinese Religions and Science
- Chinese Religions, Chinese Buddhism and Science
- Chinese Religions, Confucianism and Science in China
- Chinese Religions, Daoism and Science in China
- Chinese Religions, History of Science and Religion in China
- Christianity
- Christianity, Anglican, Issues in Science and Religion
- Christianity, Evangelical, Issues in Science and Religion
- Christianity, History of Science and Religion
- Christianity, Lutheran, Issues in Science and Religion
- Christianity, Orthodox, Issues in Science and Religion
- Christianity, Pentecostalism, Issues in Science and Religion
- Christianity, Radical Reformed, Issues in Science and Religion
- Christianity, Reformed, Issues in Science and Religion
- Christianity, Roman Catholic, Issues in Science and Religion
- Christology
- Clockwork Universe
- Cloning
- Closed Universe
