Encyclopedias, Almanacs, Transcripts, and Maps
- Carteret Islands
- Carteret, John
- Carteret, Sir George
- Cartes Jara, Horacio Manuel
- Cartesian philosophy
- Cartwright, Sir Richard John
- Caruaru
- Carucci, Jacopo
- Carus
- Casa Fuerte, Juan de Acuña, marqués de
- casaba melon
- Casal, Julián del
- Cascade-Siskiyou National Monument
- Casco Bay
- casehardening
- Caserta
- Casgrain, Henri Raymond
- Casilinum
- Casimir I
- Casimir II