| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Ober-Metzenseifen | city | Kosicky | Slovakia | 48.71 | 20.90 | 1210 | 5954 |
| Ober-Metzenseifen,Vysni Medzev,Vyšní Medzev | city | Kosicky | Slovakia | 48.71 | 20.90 | 1210 | 5954 |
| Obermetzenseifen | city | Kosicky | Slovakia | 48.71 | 20.90 | 1210 | 5954 |
| Oborin | city | Kosicky | Slovakia | 48.54 | 21.88 | 305 | 2336 |
| Ochtiná | city | Kosicky | Slovakia | 48.68 | 20.33 | 1030 | 3564 |
| Odorin | city | Kosicky | Slovakia | 48.93 | 20.63 | 1669 | 12871 |
| Ol'soviany | city | Kosicky | Slovakia | 48.71 | 21.41 | 830 | 8315 |
| Olcnava | city | Kosicky | Slovakia | 48.93 | 20.76 | 1669 | 8756 |
| Ols | city | Kosicky | Slovakia | 48.91 | 20.65 | 1669 | 9963 |
| Oláhpatak | city | Kosicky | Slovakia | 48.77 | 20.42 | 1669 | 3624 |
| Olšina | city | Kosicky | Slovakia | 48.61 | 21.78 | 344 | 12092 |
| Olšovany | city | Kosicky | Slovakia | 48.71 | 21.41 | 830 | 8315 |
| Omlas | city | Kosicky | Slovakia | 48.58 | 21.79 | 331 | 7830 |
| Opatska | city | Kosicky | Slovakia | 48.68 | 21.32 | 830 | 49386 |
| Opatska,Opátska | city | Kosicky | Slovakia | 48.79 | 21.06 | 1945 | 1594 |
| Opiná | city | Kosicky | Slovakia | 48.85 | 21.43 | 1669 | 4620 |
| Opátka | city | Kosicky | Slovakia | 48.79 | 21.06 | 1945 | 1594 |
| Opátska | city | Kosicky | Slovakia | 48.79 | 21.06 | 1945 | 1594 |
| Orechová | city | Kosicky | Slovakia | 48.71 | 22.22 | 830 | 6423 |
| Oreske | city | Kosicky | Slovakia | 48.86 | 21.90 | 830 | 7028 |
| Oros | city | Kosicky | Slovakia | 48.37 | 21.87 | 295 | 4231 |
| Oroszsebes | city | Kosicky | Slovakia | 48.86 | 22.30 | 1669 | 1625 |
| Ortov | city | Kosicky | Slovakia | 48.58 | 22.10 | 341 | 13018 |
| Ortás | city | Kosicky | Slovakia | 48.83 | 21.36 | 1220 | 7983 |
| Ortáše | city | Kosicky | Slovakia | 48.83 | 21.36 | 1220 | 7983 |
| Ostrov | city | Kosicky | Slovakia | 48.72 | 22.16 | 383 | 9228 |
| Osuchov | city | Kosicky | Slovakia | 48.68 | 21.58 | 830 | 3458 |
| Ozorovce | city | Kosicky | Slovakia | 48.66 | 21.61 | 830 | 4957 |
| Oľsoviany,Oľšoviany | city | Kosicky | Slovakia | 48.71 | 21.41 | 830 | 8315 |
| Oľšoviany | city | Kosicky | Slovakia | 48.71 | 21.41 | 830 | 8315 |