Encyclopedias, Almanacs, Transcripts, and Maps
- Costa (Ecuador)
- Costa (Peru)
- Costa e Silva, Artur da (1902–1969)
- Costa Rica, Constitutions
- Costa Rica, National Liberation Party
- Costa Rica, Second Republic
- Costa, Cláudio Manuel da (1729–1789)
- Costa, Hipólito José da (1774–1823)
- Costa, Lúcio (1902–1998)
- Costa, Uriel da (1585–1640)
- Costanoan
- Costas, Robert Quinlan ("Bob")
- Cotabato Manobo
- Cotapos Baeza, Acario (1889–1969)
- Côte D’Ivoire
- Cotegipe, Barão de (1815–1889)
- Coto War
- Cotocollao
- Cotopaxi Quichua
- Cotten, Joseph Cheshire