We have so far registered 4,509 shipyards
| Name | | J. McColl, New Glasgow, Nova Scotia, Canada |
| J. McDougall, Dundas, Prince Edward Island |
| J. McGregor & Co., Dunedin, New Zealand |
| J. Meijer Scheepsbouw Maatschappij, Leeuwarden, Nederland |
| J. Meyer S.B. Co, Leeuwen, Holland |
| J. Meyers Shipbuilding Co, Zalt-Bommel, Holland |
| J.M. Kleivset Båtbyggeri, Bårdset/Halsnaustan |
| J. Monteith, Maitland, Nova Scotia, Canada |
| J.M. Osmunsen, Arendal |
| J. Muirhead, Miramichi, New Brunswick |
| J. Mulcaha, Digby, Yarmouth, Nova Scotia |
| J. N. Christensen, Nordby, Fanø, Danmark |
| J. Nielsens Verft , Kragerø |
| J. Nilsen, Sannidal, Kragerø |
| Job Bros., St. John`s, Newfoundland, Canada |
| J. O'Brien,Maccan, Nova Scotia, Canada |
| J.O. Curtis, Medford, Mass., USA |
| Johan Bang, Gøteborg |
| Johan Drage A/S, Rognan |
| Johan Heyman, Dirhamn, Riguldi, Estland |
| Johan H. Wiiks Verksted, Helland i Vestnes |
| Johan Jeremiassens Verft, Porsgrund |
| Johan Jørgensens Verft, Fjære, Grimstad |
| Johan Lange, Bremen, Tyskland |
| Johan Michelsen, Vikedal, Ryfylke |
