| Code | Name | Region |
|---|---|---|
| ROMGR | Magurele | IF |
| ROMGU | Magureni | PH |
| ROMAH | Mahmudia | TL |
| ROMIR | Maieru | BN |
| ROISC | Isaccea | TL |
| ROIVE | Ivesti, Galati | |
| ROIZB | Izbiceni | |
| ROIZV | Izvin | TM |
| ROJRT | Jaristea | VN |
| ROJB9 | Jibou | SJ |
| ROJDV | Jidveiu | AB |
| ROJVA | Jilava | B |
| ROJIL | Jimbolia | |
| ROJOI | Joita | GR |
| RORZK | Jucu-herghelia | CJ |
| ROJUD | Jud. Maramures | |
| ROKRA | Krasna | |
| ROSLL | Lalosu | VL |
| ROLRM | Lancram | |
| ROLAS | Lasi | B |
| ROZUI | Lazuri | DB |
| ROLMN | Lemnia | CV |
| ROLER | Leresti | AG |
| ROLTI | Liesti | GL |
| ROHAR | Harau | HD |
| ROHA3 | Harghita-bai | HR |
| RORVA | Harsova | CT |
| ROHTG | Hateg, Hunedoara | HD |
| ROHID | Hida | SJ |
| ROHDS | Hidiselu De Sus | BH |
| ROHTI | Hintesti | |
| ROHDC | Hodac | MS |
| RORZF | Hodosa | MS |
| ROHOZ | Hoghiz | BV |
| ROHOR | Horezu | GJ |
| RORZG | Huedin | CJ |
| ROHUN | Hunedoara | HD |
| RORZH | Husi | VS |
| ROIMA | Ialomica, Judecul | IL |
| RORZI | Ianca | BR |
| ROIAS | Iasi | IS |
| ROILF | Ilfoveni | DB |
| ROIVM | Ilva Mica | BN |
| ROIBZ | Intorsura Buzaului | CV |
| ROGIU | Giubega | |
| ROGLE | Giulesti | SV |
| ROGRG | Giurgiu | GR |
| ROGRN | Giurgiu Nord | |
| ROGLN | Glina | B |
| ROGLO | Glogova | GJ |