We have so far registered 4,509 shipyards
| Name | | Irvine S.B. & D.D. Co., West Hartlepool, UK |
| Irvine Ship Building & Engine Co. Ltd., Irvine, UK |
| Isak Lamos Båtbyggeri, Tomrefjord |
| I. Sanderson, Princeport, Nova Scotia, Canada |
| Ishikawajima do Brasil Est.SA, Rio de Janeiro |
| Ishikawajima Harima Heavy Ind., Chita, Japan |
| Ishikawajima Harima Heavy Ind. Co. Ltd., Aioi, Japan |
| Ishikawajima - Harima Heavy Industries Co. Ltd., Kure, Japan |
| Ishikawajima Harima Heavy Industries Co. Ltd., Nagoya, Japan |
| Ishikawajima - Harima Heavy Industries Inc. Tokyo |
| Ishikawajima Harima Heavy Industries, Yokohama |
| Island of Man |
| Istanbul Tersanceilik ve Denizcilik, Istanbul |
| Italcantieri S.p.A, Monfalcone, Italia |
| Italthai Marine Co Ltd, Samut Prakan |
| Iver Hagen, Hjelset |
| Iwagi Zosen K.K., Iwagi |
| J. Aanonsen, Arendal |
| J. Aasmundsen, Arendal |
| J.A. Bang, Gävle, Sverige |
| Jabez Williams, New York, USA |
| Jac. Bodewes, Hoogezand, Holland |
| Jac. Kitchin, River Jones, Pictou, NS, Canada |
| Jacob Boe, Grimstad |
| Jacob Bøe, Fevik, Grimstad |
