| Code | Name | Region |
|---|---|---|
| SKKAO | Kolarovo | NI |
| SKKNA | Komarno | NI |
| SKKNP | Komarno Port | NI |
| SKKOM | Komjatice | NI |
| SKKRM | Koromla | |
| SKKTK | Kos | TC |
| SKKOS | Koseca | TC |
| SKHNE | Humenne | |
| SKHBV | Hurbanova Ves | |
| SKHBO | Hurbanovo | NI |
| SKILV | Ilava | |
| SKPEL | Ipelsky Sokolec | NI |
| SKSZC | Istebne | ZI |
| SKIVA | Ivanka Pri Dunaji | BL |
| SKIPN | Ivanka Pri Nitre | NI |
| SKSZP | Jablonica | TA |
| SKJNT | Jablonov Nad Turnou | |
| SKJLO | Jablonove | BL |
| SKSZO | Jahodna | TA |
| SKJAR | Jarovce | BL |
| SKJAS | Jasenica | |
| SKJBE | Jaslovske Bohunice | TA |
| SKJOS | Jasov | KI |
| SKJAO | Jasova | NI |
| SKJSV | Jasova | NI |
| SKJAV | Javorina | PV |
| SKJKA | Jelka | TA |
| SKHLO | Hlohovec | TA |
| SKHZD | Hniezdne | PV |
| SKSZK | Hnusta | BC |
| SKHRS | Hodrusa | BC |
| SKHOL | Holic | TA |
| SKHOE | Holice | TA |
| SK8EB | Hontianske Tesare | BC |
| SKHOK | Horna Kralova | NI |
| SKHST | Horna Streda | |
| SKHSM | Horne Srnie | TC |
| SKSZL | Horny Hricov | ZI |
| SKHOR | Horovce | |
| SKHOS | Hostovce | KI |
| SKHRV | Hradiste Pod Vratnom | TA |
| SKHHA | Hranicne | |
| SKHRI | Hricov | ZI |
| SKHNA | Hrinova | |
| SKHRN | Hrnciarovce Nad Parnou | TA |
| SKHDU | Hronska Dubrava | BC |
| SKHUL | Hul | NI |
| SKFIA | Filakovo | BC |
| SKFNT | Fintice | PV |
| SKFCE | Fricovce | PV |