Encyclopedias, Almanacs, Transcripts, and Maps
- Cornforth, Sir John Warcup
- Corning
- Cornish hen
- Cornish literature
- Corno, Monte
- Cornwell, David John Moore
- Coro
- corolla
- Coronado National Memorial
- coronavirus
- corposant
- corpus callosum
- Correa Delgado, Rafael Vicente
- correspondence principle
- Corrèze
- Corrievrekin
- Corrigan, Mairead
- corrosive sublimate
- Corryvreckan
- Corsicana