N
| Class | Country | Type | Launch years | Displacement (tons) | Number |
| N | UK | destroyer | 1940-41 | 1,690 | 8 |
| Nagara | Japan | light cruiser | 1920-21 | 5,088 | 6 |
| Nagato | Japan | battleship | 1919-20 | 33,800 | 2 |
| Nagoya Maru | Japan | submarine depot ship | 6,071 | 1 | |
| Naluca | Romania | gunboat | 1914 | 266 | 2 |
| Nelson | UK | battleship | 1925 | 33,310 | 2 |
| Nevada class | US | battleship | 29,000 | 2 | |
| New Mexico | US | battleship | 33,000 | 3 | |
| New Orleans | US | heavy cruiser | 1933-36 | 10,136 | 7 |
| New York | US | battleship | 27,000 | 2 | |
| Norfolk | UK | heavy cruiser | 1928-29 | 9,925-9,975 | 2 |
| North Carolina | US | battleship | 1940 | 37,484 | 2 |
| Northampton | US | heavy cruiser | 1929-30 | 9,006 | 6 |
| Noshiro Maru | Japan | armed merchant cruiser | 7,183 | 1 |
Read more about this topic: List Of World War II Ship Classes