| Osloboditeľov | 920 03 | Postcode Osloboditelov (street) » Hlohovec » Slovakia |  |
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| Osloboditeľov | 984 01 | Postcode Osloboditelov (street) » Lucenec » Slovakia | | |
| Osloboditeľov | 911 01 | Postcode Osloboditelov (street) » Trencin » Slovakia | | |
| Osloboditeľov | 010 01 | Postcode Osloboditelov (street) » Zilina » Slovakia | | |
| Osloboditeľská | 831 07 | Postcode Osloboditelska (street) » Bratislava » Slovakia | | |
| Osrblie | 976 45 | Postcode Osrblie » Brezno » Slovakia | | |
| Ostrany | 980 26 | Postcode Ostrany » Rimavska Sobota » Slovakia | | |
| Ostratice | 956 34 | Postcode Ostratice » Partizanske » Slovakia | | |
| Ostravská | 811 04 | Postcode Ostravska (street) » Bratislava » Slovakia | | |
| Ostravská | 040 11 | Postcode Ostravska (street) » Kosice » Slovakia | | |
| Ostravská | 917 02 | Postcode Ostravska (street) » Trnava » Slovakia | | |
| Ostredková | 821 02 | Postcode Ostredkova (street) » Bratislava » Slovakia | | |
| Ostriežová | 010 01 | Postcode Ostriezova (street) » Zilina » Slovakia | | |
| Ostrihomská | 943 01 | Postcode Ostrihomska (street) » Sturovo » Slovakia | | |
| Ostrov | 072 55 | Postcode Ostrov » Sobrance » Slovakia | | |
| Ostrov | 922 01 | Postcode Ostrov » Piestany » Slovakia | | |
| Ostrovany | 082 22 | Postcode Ostrovany » Sabinov » Slovakia | | |
| Ostrovského | 040 01 | Postcode Ostrovskeho (street) » Kosice » Slovakia | | |
| Ostružinová | 821 07 | Postcode Ostruzinova (street) » Bratislava » Slovakia | | |
| Ostrá | 034 01 | Postcode Ostra (street) » Ruzomberok » Slovakia | | |
| Ostrá Lúka | 962 61 | Postcode Ostra Luka » Zvolen » Slovakia | | |
| Ostrý Grúň | 966 77 | Postcode Ostry Grun » Zarnovica » Slovakia | | |
| Osturňa | 059 79 | Postcode Osturna » Kezmarok » Slovakia | | |
| Osuské | 906 12 | Postcode Osuske » Senica » Slovakia | | |
| Osuského | 851 03 | Postcode Osuskeho (street) » Bratislava » Slovakia | | |
