Encyclopedias, Almanacs, Transcripts, and Maps
- Confraternity of Christian Doctrine
- Congaree National Park
- congestive heart failure
- Congo eel
- Congo Republic
- Congo, kingdom of the
- conical surface
- Coningh, Philips de
- Conjeeveram
- conjoined twins
- Connaught
- Connaught, Arthur William Patrick Albert, duke of
- Connecticut Reserve
- connective tissue
- Connell, Evan Shelby, Jr.
- Connellsville
- Connersville
- Conon
- Conowingo Dam
- Conrad I (ruler of the Holy Roman Empire)