| Name | Length (m) | Year | Builder |
|---|---|---|---|
| Jura II | 36.58 | 1963 | Hall Russell |
| Jus Chilln 3 | 32.92 | 2015 | Benetti SpA |
| Just 4 | 27.96 | 2021 | Pershing S.p.a. |
| Just A Vacation | 29.59 | 2024 | Ocean Alexander |
| Just B | 59 | 1973 | Amels |
| Just Enough | 42.97 | 2012 | Ares Custom Yachts |
| Just J's | 61 | 2016 | Royal Hakvoort Shipyard |
| Just J's | 31.01 | 2006 | Sunseeker |
| Just One More | 28.06 | 2017 | Sunseeker |
| Just Perfect | 29.1 | 2024 | Princess Yachts |
| Just4Us | 34.8 | 2001 | Newcastle Marine |
| Justa Delia | 44.2 | 2008 | Benetti SpA |
| Justine | 29.57 | 1987 | Couach Yachts |
| Jülem 1 | 38.38 | 2013 | Vicem Yachts |
| K | 42 | 2018 | SES Yachts |
| K | 30.48 | 1992 | Broward Marine |
| K+ | 38.2 | 2022 | Maori Yacht |
| K.C.'s Dream | 30 | 2001 | Dragos Yachts |
| K2 | 32.82 | 2022 | Custom Line |
| K2 | 35.75 | 2024 | Sanlorenzo |
| K2 | 49.5 | 2021 | Columbus Yachts |
| KD | 64 | 2024 | Sanlorenzo |
| Kadimo's | 36.8 | 2007 | Couach Yachts |
| Kadimo's | 49.9 | 2015 | Codecasa S.p.A. |
| Kahala | 40.8 | 2023 | Benetti SpA |
| Kahalani | 55.05 | 2010 | Feadship |
| Kahu | 36.58 | 1979 | Whangarei Engineering & Construction Ltd (WECO) |
| Kairos | 38 | 2007 | Aegean Yacht |
| Kaiser | 60 | 2011 | Abeking & Rasmussen |
| Kaizen | 48.5 | 2000 | Alloy Yachts |
| Kaizen II | 27.9 | 2008 | Jade Yachts |
| Kajak | 40.23 | 2008 | Horizon Yachts |
| Kala | 27.99 | 2008 | Sunseeker |
| Kala | 29.1 | 2019 | Azimut Yachts |
| Kalamoun | 36.52 | 1972 | Abeking & Rasmussen |
| Kaldari | 32.68 | 2014 | Gulf Craft |
| Kaleen | 33.44 | 1983 | Broward Marine |
| Kalimera | 30.1 | 2003 | Cantieri di Pisa |
| Kalinga | 53.7 | 1982 | Feadship |
| Kalisa | 28.3 | 2009 | Benetti Sail Division |
| Kalizma | 50.29 | 1906 | Ramage & Ferguson |
| Kamalaya | 55 | 2013 | Amels |
| Kamaxitha | 55 | 2012 | Royal Huisman |
| Kamaxitha | 28.04 | 2003 | Horizon Yachts |
| Kamino | 33.5 | 2016 | Feadship |
| Kampai | 28.27 | 2005 | Overmarine Group SPA |
| Kaori | 38.1 | 1991 | Palmer Johnson Yachts |
| Kaos | 110.1 | 2017 | Oceanco |
| Kappa | 30.5 | 1982 | Cantieri di Pisa |
| Kaptan Kadir | 37 | 2004 | Kadir Turhan |