| Code | Name | Region |
|---|---|---|
| DEDWH | Dahlwitz-hoppegarten | BB |
| DEDHI | Dahme/holstein | SH |
| DEDKK | Dahme/mark | BB |
| DECTF | Crottendorf | SN |
| DECVQ | Crussow | BB |
| DECUM | Cumlosen | BB |
| DECWE | Cunewalde | SN |
| DECUQ | Cunnersdorf Bei Freital | SN |
| DECUK | Cursdorf | TH |
| DECUX | Cuxhaven | NI |
| DEDAD | Daaden | RP |
| DEDSO | Daasdorf Am Berge | TH |
| DEDXL | Dabel | MV |
| DEDEF | Dabendorf | BE |
| DEDGO | Dabergotz | BB |
| DEDKO | Daberkow | MV |
| DEDUK | Dabrun | ST |
| DEDAC | Dachau | BY |
| DEDRD | Dachrieden | TH |
| DEDSH | Dachsbach | BY |
| DEDHS | Dachsenhausen | RP |
| DEDW2 | Dachwig | TH |
| DEDPZ | Dackenheim | RP |
| DECRS | Cramonshagen | MV |
| DECPR | Craupe | BB |
| DECRW | Crawinkel | TH |
| DECGL | Creglingen | BW |
| DECRE | Cremlingen | NI |
| DECSN | Creussen | BY |
| DECZU | Creuzburg | TH |
| DECMJ | Crimla | TH |
| DECMU | Crimmitschau | SN |
| DECRZ | Crinitz | BB |
| DECFR | Crispendorf | TH |
| DECRI | Crivitz | MV |
| DECHQ | Crochern | ST |
| DECRK | Crock | TH |
| DECPJ | Crolpa | ST |
| DECNG | Cronenberg Bei Lauterecken | RP |
| DECSS | Crossen (zwickauer Land) | SN |
| DECRR | Crossen An Der Elster | TH |
| DECRO | Crostau | SN |
| DECSI | Crostwitz | SN |
| DECMI | Commichau | SN |
| DECON | Conow | MV |
| DECOV | Contwig | RP |
| DECPZ | Copitz | SN |
| DECPP | Coppenbrugge | NI |
| DECPA | Coppengrave | NI |
| DECOK | Cormigk | ST |