Encyclopedias, Almanacs, Transcripts, and Maps
- Cotingas (Cotingidae)
- council tax
- Councils
- Councils: Buddhist Councils
- Councils: Christian Councils
- Cousteau Society, The
- Cousteau, Jacques-Yves (1910 – 1997) French Oceanographer, Inventor, Photographer, Explorer, and Environmentalist
- coypu
- Coypus (Myocastoridae)
- Crab Plovers (Dromadidae)
- crake
- Cranes (Gruidae)
- cranesbill
- crater lake
- creation myth
- Creeds
- Creeds: An Overview
- Creeds: Christian Creeds
- Creeds: Islamic Creeds
- Creolization