word | | Country name |
| Nouvelle | New Caledonia | conventional long form: Territory of New Caledonia and Dependencies conventional short form: New Caledonia local long form: Territoire des Nouvelle-Caledonie et Dependances local short form: Nouvelle-Caledonie |
| Nunaat | Greenland | conventional long form: none conventional short form: Greenland local long form: none local short form: Kalaallit Nunaat |
| Nyasaland | Malawi | conventional long form: Republic of Malawi conventional short form: Malawi local long form: Dziko la Malawi local short form: Malawi former: British Central African Protectorate, Nyasaland Protectorate, Nyasaland |
| nyu | Niue | conventional long form: none conventional short form: Niue note: pronunciation falls between nyu-way and new-way, but not like new-wee former: Savage Island |
| NZ | New Zealand | conventional long form: none conventional short form: New Zealand abbreviation: NZ |
| Ocean | British Indian Ocean Territory | conventional long form: British Indian Ocean Territory conventional short form: none abbreviation: BIOT |
| Oceania | French Polynesia | ... form: Overseas Lands of French Polynesia conventional short form: French Polynesia local long form: Pays d'outre-mer de la Polynesie Francaise local short form: Polynesie Francaise former: French Colony of Oceania |
| Oeno | Pitcairn Islands | conventional long form: Pitcairn, Henderson, Ducie, and Oeno Islands conventional short form: Pitcairn Islands |
| Oesterreich | Austria | conventional long form: Republic of Austria conventional short form: Austria local long form: Republik Oesterreich local short form: Oesterreich |
| official | Hong Kong | conventional long form: Hong Kong Special Administrative Region conventional short form: Hong Kong official long form: Xianggang Tebie Xingzhengqu official short form: Xianggang abbreviation: HK |
| official | Macau | conventional long form: Macau Special Administrative Region conventional short form: Macau official long form: Aomen Tebie Xingzhengqu (Chinese); Regiao Administrativa Especial de Macau (Portuguese) official short form: Aomen (Chinese); Macau (Portuguese) |