- Ian – 1972
- Ibex (1979)
- Ibn Battouta 2 (1993)
- Ichnusa (1986)
- Ida (1959)
- Igounimetsa (1999)
- Ikarus (1997)
- Ikarus Palace (1997)
- Ile de Beauté (1979)
- Ilmatar (1964)
- Ilyich (1973)
- Incat 043 (1997)
- Incat 044 (1997)
- Incat 045 (1997)
- Incat 049 (1998)
- Incat K3 (1998)
- HSC Incat Tasmania (2000)
- Ingrid (1980)
- Innstar (1967)
- Ionas (1989)
- Ionian Express (1975)
- Ionian Glory (1988)
- Ionian Queen (1988)
- Ionian Spirit (1972)
- Ionian Star (1971)
- Isabella (1989)
- Isabella 1 (1981)
- Isabelle (1989)
- Isefjord (2013)
- Isla de Botafoc (1980)
- Isla de la Gomera (1993)
- Island Fiesta (1971)
- Isle of Inisheer (2000)
- Isle of Innisfree (1986)
- Isle of Innisfree (1992)
- Isle of Inishmore (1981)
- Isle of Inishmore (1997)
- Isle of Inishturk (1981)
- Isola di Capraia (1999)
- Isola di Capri (1998)
- Isola di Procida (1999)
- Isola di Vulcano (1999)