Vi har så langt registrert 4 539 verft
| Navn | | John Ransom, Southampton |
| John Readhead & Sons., South Shields, UK |
| John Reid & Co., Port Glasgow, UK |
| John Robinson, Sunderland |
| John Scott & Co. Abden Shipyard, Kingshorn, Skottland |
| John Scott & Son, Ironfoundry and Shipyard i Inverkeithing, Skottland. |
| John shearer & Son, Elderslie, Glasgow, Skottland. |
| John Smith, Aberdeen |
| John S. Parker, Tynemouth Creek, New Brunswick, Canada |
| John Terjesen, Vigkilen, Grimstad |
| John Thornycroft & Co, Southampton, England |
| Johs. Kristensen Skibsbyggeri Aps, Hvide Sande |
| Joh. Wesmann, Åsgårdstrand |
| J.O. Johansson, Gamla Lødøse, Sverige |
| Jollet & Belin’s Yard, Nantes, Frankrike |
| J. Olmanns, Brake, Tyskland |
| J. Olsen, Porsgrunn |
| J. Oltmann`s Werft, Brake, Tyskland |
| Jondal |
| Jones & Ashcroft, Baltimore, MD, USA |
| Jones Buckie Slip & Shipyard, Buckie, UK |
| Jones, Digby, Nova Scotia, Canada |
| Jones, Quiggin & Co., Liverpool, UK |
| Jonker & Stans, Hendrik-Ido-Ambacht, Nederland |
| Jordfallen, Larvik |
