- Clausen
- Clausmarbach
- Clausnitz
- Claußnitz
- Clausthal
- Clausthal-Zellerfeld
- Cleeberg
- Cleebronn
- Clemens-August-Dorf
- Clementelvitz
- Clennen
- Clenze
- Cleve
- Cleve
- Clever Landwehr
- Cleverbrück
- Cleverns
- Cleversulzbach
- Clieben
- Climbach
- Clingen
- Clodra
- Clonsbach
- Cloppenburg
- Closewitz
- Clostern
- Clues
- Clus
- Clus
- Clusorth
- Cluvenhagen
- Clüversborstel
- Cobbel
- Cobbelsdorf
- Cobbenrode
- Coblenz
- Cobstädt
- Coburg
- Coburg
- Cochem
- Cochstedt
- Coerde
- Coesfeld
- Cölbe
- Cölbigk
- Colbitz
- Coldam
- Coldeborg
- Coldemüntje
- Coldevitz