word | | Country name |
| conventional | Monaco | conventional long form: Principality of Monaco conventional short form: Monaco local long form: Principaute de Monaco local short form: Monaco |
| conventional | Mongolia | conventional long form: none conventional short form: Mongolia local long form: none local short form: Mongol Uls former: Outer Mongolia |
| conventional | Montenegro | conventional long form: none conventional short form: Montenegro local long form: none local short form: Crna Gora former: People's Republic of Montenegro, Socialist Republic of Montenegro, Republic of Montenegro |
| conventional | Montserrat | conventional long form: none conventional short form: Montserrat |
| conventional | Morocco | conventional long form: Kingdom of Morocco conventional short form: Morocco local long form: Al Mamlakah al Maghribiyah local short form: Al Maghrib |
| conventional | Mozambique | conventional long form: Republic of Mozambique conventional short form: Mozambique local long form: Republica de Mocambique local short form: Mocambique former: Portuguese East Africa |
| conventional | Namibia | conventional long form: Republic of Namibia conventional short form: Namibia local long form: Republic of Namibia local short form: Namibia former: German Southwest Africa, South-West Africa |
| conventional | Nauru | conventional long form: Republic of Nauru conventional short form: Nauru local long form: Republic of Nauru local short form: Nauru former: Pleasant Island |
| conventional | Navassa Island | conventional long form: none conventional short form: Navassa Island |
| conventional | Nepal | conventional long form: Federal Democratic Republic of Nepal conventional short form: Nepal local long form: Sanghiya Loktantrik Ganatantra Nepal local short form: Nepal |
| conventional | Netherlands | conventional long form: Kingdom of the Netherlands conventional short form: Netherlands local long form: Koninkrijk der Nederlanden local short form: Nederland |
| conventional | Netherlands Antilles | conventional long form: none conventional short form: Netherlands Antilles local long form: none local short form: Nederlandse Antillen former: Curacao and Dependencies |
| conventional | 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 |
| conventional | New Zealand | conventional long form: none conventional short form: New Zealand abbreviation: NZ |
| conventional | Nicaragua | conventional long form: Republic of Nicaragua conventional short form: Nicaragua local long form: Republica de Nicaragua local short form: Nicaragua |
| conventional | Niger | conventional long form: Republic of Niger conventional short form: Niger local long form: Republique du Niger local short form: Niger |
| conventional | Nigeria | conventional long form: Federal Republic of Nigeria conventional short form: Nigeria |
| conventional | Niue | conventional long form: none conventional short form: Niue note: pronounciation falls between nyu-way and new-way, but not like new-wee former: Savage Island |
| conventional | Norfolk Island | conventional long form: Territory of Norfolk Island conventional short form: Norfolk Island |
| conventional | Northern Mariana Islands | conventional long form: Commonwealth of the Northern Mariana Islands conventional short form: Northern Mariana Islands abbreviation: CNMI former: Trust Territory of the Pacific Islands, Mariana Islands District |
| conventional | Norway | conventional long form: Kingdom of Norway conventional short form: Norway local long form: Kongeriket Norge local short form: Norge |
| conventional | Oman | conventional long form: Sultanate of Oman conventional short form: Oman local long form: Saltanat Uman local short form: Uman former: Muscat and Oman |