Commander Islands — Russia (Komandorskiye Ostrova)
Conakry [US Embassy] — Guinea
Congo (Brazzaville) — Congo
Congo (Kinshasa) — Zaire
Congo (Leopoldville) — Zaire
Con Son Islands — Vietnam
Cook Strait — Pacific Ocean
Copenhagen [US Embassy] — Denmark
Coral Sea — Pacific Ocean
Corn Islands (Islas del Maiz) — Nicaragua