We have so far registered 4,509 shipyards
| Name | | 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 |
| Joseph L. Thompson & Sons Ltd., Sunderland, UK |
| Joseph Magoun, Charleston, Mass., USA |
| Josephsen, Tønsberg |
| Jose Valine Lavandeira, La Coruna, Spania |
| Joshua T. Foster, Medford, Maine, USA |
| Jos. L. Meyer Schiffswerft Gmbh. & Co, Papenburg, Tyskland |
| J. Osmundsen, Arendal |
| Jos. T. Eltringham & Co. Ltd. Wallsend. UK |
| Jos. T. Eltringham & Co, Willington Quay, UK |
| J. Oulton, Pugwash, Nova Scotia |
| J. Paulsen, Apenrade, Danmark |
| J. Paulsen & Sohn, Apenrade, (Åbenrå), Danmark |
| J. Pedersen, Tjørvågstranden, Flekkefjord |
| J. Petterson, Oulu/Uleåborg, Finland |
| J. Pettis, Fox River, Nova Scotia, Canada |
| J. P. Morse, Bath, ME, USA |
