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Nafarroa
| Nombre | Altitud | Zone | Ph. |
| Ontzanburu | 1282 | | 17 |
| Ordoiz | 547 | | 5 |
| Oregigaña | 1238 | | 17 |
| Orhi | 2017 | | 74 |
| Oritz | 556 | | 4 |
| Orlagatu | 1136 | | 19 |
| Orobeko Haitza | 846 | | 21 |
| Orraun | 1154 | | 13 |
| Ortxikasko | 977 | | 10 |
| Ortzantzurieta | 1567 | | 23 |
| Oso | 1338 | | 19 |
| Ososki | 763 | | 9 |
| Ostaita | 641 | | 6 |
| Otansur | 1076 | | 10 |
| Oteitzoiana | 685 | | 37 |
| Otolo | 778 | | 14 |
| Otsaketa | 983 | | 8 |
| Otsameaka | 814 | | 19 |
| Otsarte | 950 | | 10 |
| Otsogorrigaina | 1922 | | 22 |
| Otsondoa | 565 | | 8 |
| Otsopasaje | 720 | | 6 |
| Otxalanta | 645 | | 5 |
| Otxasko | 716 | | 18 |
| Ozin | 704 | | 9 |
| Ozpinarri | 1132 | | 7 |
| Paco Mayor | 829 | | 7 |
| Pagadi | 887 | Aranguren | 13 |
| Pagadiandieta | 836 | | 9 |
| Pagoaundi | 1029 | | 4 |
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