| Jewels | 53 | 2023 | Turquoise Yachts |
| Ji-Fung | 40.2 | 1981 | Kong & Halvorsen |
| Jiangshan | 38.1 | 2002 | Albwardy Marine Engineering |
| Jie Peng Shi Ba Hao | 33.1 | 2014 | Heysea Yachts |
| Jim Morgan | 32.22 | 1885 | H Reynolds |
| Jimmy | 49.99 | 2023 | Tankoa Yachts S.p.A. |
| Jin Long 4605 | 46.48 | 2021 | Jinlong Mega Yacht |
| Jin Lu Shun | 32 | 2014 | Dyna Yachts |
| Jo I | 49.95 | 2004 | Benetti SpA |
| Joan's Ark | 28.96 | 1984 | Christensen Shipyards, LLC. |
| Joanna B | 37.04 | 2021 | Custom Line |
| Joanna B | 29.7 | 2010 | Custom Line |
| Jodi Ann | 41.94 | 2018 | Benetti SpA |
| Joelle | 32.83 | 2020 | Custom Line |
| Johann | 28.6 | 2012 | Sanlorenzo |
| Johanna | 30.7 | 2000 | Falcon Yachts S.r.l. |
| John T. Nadin | 30.3 | 1955 | Yarrow & Co |
| Joia the Crown Jewel | 65.23 | 2010 | Codecasa S.p.A. |
| Jojo | 40 | 1993 | C.N. Officine Meccaniche Rossato |
| Joker 1 | 29.41 | 2008 | Princess Yachts |
| Joli Four | 32 | 2002 | Destiny Yachts |
| Jolie X | 38.1 | 2007 | Rodriquez Yachts |
| Jolina | 28.04 | 1995 | President Boat International Co., Ltd. |
| Jolly O | 28.35 | 1966 | Breaux Bay Craft |
| Jomar | 39.65 | 2007 | Overmarine Group SPA |
| Jona II | 30.95 | 2002 | Custom Line |
| Joseph Conrad | 37 | 1916 | G & S |
| Journey | 31.1 | 2019 | Sanlorenzo |
| Joy | 70 | 2016 | Feadship |
| Joy | 40.8 | 2021 | Benetti SpA |
| Joy Star | 28.71 | 2003 | Burger Boat Company |
| Joyette | 32.3 | 1907 | Camper & Nicholsons Shipyard |
| Joyride | 30.2 | 1996 | Overmarine Group SPA |
| Joys | 28 | 2009 | Elegance Yachts |
| Juanita | 27.74 | 1939 | Hodgdon Yachts |
| Juanky | 39.73 | 2025 | Cheoy Lee |
| Jude | 30.45 | 2019 | Princess Yachts |
| Judy | 27.6 | 2024 | Sanlorenzo |
| Juice | 71.1 | 2022 | Feadship |
| Jules | 40.93 | 2024 | Baglietto S.p.A. |
| Julia | 49.6 | 2015 | Heesen Yachts |
| Julia S | 30.75 | 2008 | Azimut Yachts |
| Julianne | 35.4 | 1991 | Crescent Custom Yachts |
| Julie M | 35.97 | 2020 | Hargrave Custom Yachts |
| Julie Mother | 30 | 1978 | Sangermani |
| Juliet | 43.58 | 1993 | Royal Huisman |
| Juneluck | 55.5 | 1994 | Feadship |
| Juno | 55 | 2020 | Heesen Yachts |
| Juno's 7 | 44.06 | 2025 | Benetti SpA |
| Jupiter | 32 | 1996 | Suprimar |
