| I Dynasty | 100.8 | 2015 | Peters Werft GmbH |
| I Love This Boat | 44.2 | 2002 | Christensen Shipyards, LLC. |
| I Nova | 49.75 | 2013 | Cosmo Explorer |
| I Sea | 41.9 | 2000 | Palmer Johnson Yachts |
| IDEC Sport | 31.5 | 2006 | Chantier Multiplast |
| III Amigos | 28.6 | 2021 | Michael Rybovich & Sons Boat Works |
| IJE | 108 | 2019 | Benetti SpA |
| ISIS | 29.93 | 2014 | Port Pin Rolland SAS |
| IV Dreams | 32.83 | 2019 | Custom Line |
| IV Tranquility | 28.65 | 2001 | Lazzara Yachts |
| IVAH511 | 59 | 2024 | Logica Yachts |
| Iary | 33.8 | 2015 | Overmarine Group SPA |
| Ibi | 34.5 | 1949 | Arsenal |
| Ice | 90.1 | 2005 | Lürssen Yachts |
| Ice | 31.09 | 2019 | Marlow Yachts |
| Ice | 30.2 | 2007 | Cantieri Navali Rizzardi |
| Ice Bear | 52 | 1988 | Feadship |
| Ice Lady | 43.3 | 1959 | Helsingfors |
| Iceberg | 33.83 | 2014 | Circa Marine |
| Icecap | 107 | 2026 | Lürssen Yachts |
| Icon | 29.8 | 1995 | Mondomarine SpA |
| Icon | 30.78 | 2014 | Gulf Craft |
| Idefix II | 47 | 2008 | Heesen Yachts |
| Idle | 32 | 2007 | CNB - Construction Navale Bordeaux |
| Idletyme II | 33.53 | 2006 | Westship Yachts |
| Idol | 58.9 | 2007 | Austal |
| Iduna | 33.5 | 1939 | Feadship |
| Idylle | 36.8 | 1996 | Benetti Sail Division |
| Idyllic | 59.4 | 2008 | Benetti SpA |
| Iemanja | 32.07 | 1988 | Chantiers Naval de Biot |
| If | 31 | 1999 | Maiora |
| If Only | 39 | 1974 | Feadship |
| Igaraporanga | 37.58 | 2015 | |
| Ikal | 29.85 | 2022 | Sunseeker |
| Ikaron | 30.5 | 2000 | Holland Jachtbouw |
| Il Capo | 33.53 | 2004 | Broward Marine |
| Il Diavolo | 30.15 | 2004 | Azimut Yachts |
| Il Gattopardo | 35.35 | 2012 | Permare s.r.l. |
| Il Sogno | 30.17 | 2022 | Extra Yachts |
| Il Sole | 44.8 | 1994 | Benetti SpA |
| Il Vagabondo | 61.2 | 1987 | CRN |
| Ile De France | 43 | 1994 | Universal Yachts Corp. |
| Ileria | 35.46 | 2007 | Azimut Yachts |
| Illa Puerto Portals | 29.44 | 2004 | Astondoa S.A. (Astilleros) |
| Illusion | 30.91 | 2011 | Azimut Yachts |
| Illusion | 65 | 2013 | Heesen Yachts |
| Illusion | 32.92 | 1996 | McQueen's Boat Works |
| Illusion I | 55.7 | 1983 | Feadship |
| Illusion II | 40 | 1990 | Lloyds Ships |
| Illusion V | 58 | 2014 | Benetti SpA |
