- Cyprus6
- Czech Republic, Ceské Budejovice1
- Czech Republic, Elbe River5
- Czech Republic, Mže River1
- Czech Republic, Pilsen Basin3
- Czech Republic, Prague2
- Czech Republic, Predslavice1
- Czech Republic, Rokycany1
- Czechoslovakia15
- Côte d'Ivoire, Abidjan3
- Danube River2
- Democratic People's Republic of Korea3
- Democratic Republic of Vietnam1
- Democratic Republic of the Congo58
- Democratic Republic of the Congo, Katanga Province8
- Denmark4
- Denmark, Bornholm1
- Denmark, Copenhagen2
- Denmark, Jutland1
- Denmark, Århus1