| Country | Nationality |
| Micronesia, Federated States of | noun: Micronesian(s) adjective: Micronesian; Chuukese, Kosraen(s), Pohnpeian(s), Yapese |
| Moldova | noun: Moldovan(s) adjective: Moldovan |
| Monaco | noun: Monegasque(s) or Monacan(s) adjective: Monegasque or Monacan |
| Mongolia | noun: Mongolian(s) adjective: Mongolian |
| Montenegro | noun: Montenegrin(s) adjective: Montenegrin |
| Montserrat | noun: Montserratian(s) adjective: Montserratian |
| Morocco | noun: Moroccan(s) adjective: Moroccan |
| Mozambique | noun: Mozambican(s) adjective: Mozambican |
| Namibia | noun: Namibian(s) adjective: Namibian |
| Nauru | noun: Nauruan(s) adjective: Nauruan |
| Navassa Island | void |
| Nepal | noun: Nepali (singular and plural) adjective: Nepali |
| Netherlands | noun: Dutchman(men), Dutchwoman(women) adjective: Dutch |
| New Caledonia | noun: New Caledonian(s) adjective: New Caledonian |
| New Zealand | noun: New Zealander(s) adjective: New Zealand |
| Nicaragua | noun: Nicaraguan(s) adjective: Nicaraguan |
| Niger | noun: Nigerien(s) adjective: Nigerien |
| Nigeria | noun: Nigerian(s) adjective: Nigerian |
| Niue | noun: Niuean(s) adjective: Niuean |
| Norfolk Island | noun: Norfolk Islander(s) adjective: Norfolk Islander(s) |
| Northern Mariana Islands | noun: NA (US citizens) adjective: NA |
| Norway | noun: Norwegian(s) adjective: Norwegian |