| Code | Name | Region |
|---|---|---|
| BGOLT | Oltomantsi | |
| BGOMU | Omurtag | |
| BGOPK | Opaka | |
| BGOPN | Opanets | 8 |
| BGORE | Orehovo | |
| BGLOK | Lokorsko | 22 |
| BGLOM | Lom | |
| BGTLI | Lomci | 25 |
| BGLVP | Lovech | |
| BGLOZ | Lozarevo | 2 |
| BGLUK | Lukovit | 11 |
| BGLKS | Lyaskovets | 4 |
| BGLYA | Lyaskovo | 21 |
| BGLMC | Lyubimets | |
| BGBLO | Lyuliakovo | 2 |
| BGMAD | Madan | 21 |
| BGMTI | Malko Tarnovo | 2 |
| BGSHU | Malomir | 27 |
| BGPLO | Manole | 16 |
| BGMAB | Marchevo | 1 |
| BGMAI | Marikostinovo | 1 |
| BGMNR | Mednikarovo | 24 |
| BGMEL | Melnik | |
| BGMEZ | Mezdra | 6 |
| BGMIH | Mihalkovo | 21 |
| BGKOS | Kostenets | 23 |
| BGKBR | Kostinbrod | 22 |
| BGKOT | Kotel | 20 |
| BGKOY | Koynare | 15 |
| BGKOZ | Kozloduj | 23 |
| BGHKM | Krichim | 16 |
| BGVKD | Krivodol | 12 |
| BGKRU | Krumovgrad | 9 |
| BGKRH | Krushari | |
| BGKUB | Kubrat | 17 |
| BGKUK | Kuklen | 16 |
| BGKUL | Kula | 5 |
| BGKOL | Kulata | |
| BGKDG | Kurdzhali | |
| BGKYS | Kyustendil | |
| BGLKI | Laki | |
| BGLED | Ledenik | 4 |
| BGLES | Leskovets | 6 |
| BGLSD | Levski | |
| BGLIA | Liaskovec | 4 |
| BGKRM | Kardzali | 26 |
| BGKVO | Karlovo | |
| BGKBT | Karnobat | |
| BGKPH | Kaspichan | |
| BGKAT | Katunitza | 16 |