| Obchodná | 969 01 | Postcode Obchodna (street) » Banska Stiavnica » Slovakia |  |
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| Obchodná | 811 06 | Postcode Obchodna (street) » Bratislava » Slovakia | | |
| Obchodná | 945 04 | Postcode Obchodna (street) » Komarno » Slovakia | | |
| Obchodná | 040 11 | Postcode Obchodna (street) » Kosice » Slovakia | | |
| Obchodná | 031 01 | Postcode Obchodna (street) » Liptovsky Mikulas » Slovakia | | |
| Obchodná | 955 01 | Postcode Obchodna (street) » Topolcany » Slovakia | | |
| Obchodná | 911 05 | Postcode Obchodna (street) » Trencin » Slovakia | | |
| Obchodná | 093 01 | Postcode Obchodna (street) » Vranov nad Toplou » Slovakia | | |
| Obchodná | 010 08 | Postcode Obchodna (street) » Zilina » Slovakia | | |
| Obeckov | 991 05 | Postcode Obeckov » Velky Krtis » Slovakia | | |
| Obecná | 953 05 | Postcode Obecna (street) » Zlate Moravce » Slovakia | | |
| Obežná | 821 02 | Postcode Obezna (street) » Bratislava » Slovakia | | |
| Obežná | 010 08 | Postcode Obezna (street) » Zilina » Slovakia | | |
| Obid | 943 04 | Postcode Obid » Nove Zamky » Slovakia | | |
| Obišovce | 044 81 | Postcode Obisovce » Kosice-okolie » Slovakia | | |
| Oblazov | 013 61 | Postcode Oblazov » Bytca » Slovakia | | |
| Oblačná | 831 06 | Postcode Oblacna (street) » Bratislava » Slovakia | | |
| Oblá | 040 01 | Postcode Obla (street) » Kosice » Slovakia | | |
| Oblúková | 821 06 | Postcode Oblukova (street) » Bratislava » Slovakia | | |
| Oblúková | 917 01 | Postcode Oblukova (street) » Trnava » Slovakia | | |
| Oborín | 076 75 | Postcode Oborin » Michalovce » Slovakia | | |
| Obr. mieru | 947 01 | Postcode Obr. mieru (street) » Hurbanovo » Slovakia | | |
| Obrancov mieru | 969 01 | Postcode Obrancov mieru (street) » Banska Stiavnica » Slovakia | | |
| Obrancov mieru | 040 01 | Postcode Obrancov mieru (street) » Kosice » Slovakia | | |
| Obrancov mieru | 934 01 | Postcode Obrancov mieru (street) » Levice » Slovakia | | |
