- Madeleine (1981)
- Madeleine II (2019)
- Mads Mols (1998)
- Maersk Delft (2006)
- Maersk Dover (2006)
- Maersk Dunkerque (2005)
- Mai Mols (1996)
- Majestic (1993)
- Malmö Link (1980)
- Malo Seaways (2000)
- Malta Express (1980)
- Mama Tanzania (1972)
- Mambro (1965)
- Manuel Soto (1976)
- Marco Polo (1993)
- Mare Balticum (1979)
- Marella (1970)
- Maren Mols (1996)
- Margrete Læsø (1997)
- Margrethe (1973)
- Maria G (1976)
- Maria Grazia On (2004)
- Mariella (1985)
- Marine Atlantica (1975)
- Marine Evengeline (1974)
- Marine Nautica (1974)
- Marsk Stig (1940)
- Marstal (1999)
- Massalia (1971)
- Master Cat (1998)
- Mastrafjord (2007)
- Max (1998)
- Max Mols (1998)
- Mazovia (1996)
- Mecca I (1970)
- Mecklenburg-Vorpommern (1996)
- Mediterranean Sun (1972)
- Mediterranée (1989)
- Mediterranée (2002)
- Medmar Giorgia (1982)
- Medmar Giulia (1971)
- Mega Andrea (1986)
- Mega Express (2001)
- Mega Express Two (2001)
- Mega Express Four (1995)
- Mega Express Five (1993)
- Mega Regina (1985)
- Mega Smeralda (1985)
- Mega Victoria (1988)
- Megastar (2017)
- Meloodia (1979)
- Meloodia 1 (1979)
- Menja (1998)
- Mercandia IV (1989)
- Mercandia VIII (1987)
- Mergus (1984)
- Meritie-Havsvägen (1967)
- Merituuli (1968)
- Merkurius (1999)
- Mermaid (1972)
- Mermaid II (1972)
- Mersey Seaways (2005)
- Mersey Viking (1997)
- Mersey Viking (2005)
- Mette Mols (1996)
- Meyer Turku NB (2017)
- Midnatsol (1982)
- Midnatsol (2003)
- Midnatsol II (1982)
- Midnight Merchant (2000)
- Mie Mols (1971)
- Mie Mols (1996)
- Miguel Hernandez (1989)
- Mikhail (1986)
- Mikhail Sholokhov (1986)
- Mikhail Suslov (1982)
- Mikkel Mols (1969)
- Milos Express (1969)
- Min Nan (1972)
- Minisea (1953)
- Moby Aki (2005)
- Moby Ale (1969)
- Moby Ale Due (2001)
- Moby Baby (1966)
- Moby Baby 2 (1974)
- Moby Corse (1978)
- Moby Dada (1981)
- Moby Drea (1975)
- Moby Dream (1967)
- Moby Fantasy (1976)
- Moby Fantasy (2022)
- Moby Freedom (2001)
- Moby Lally (1974)
- Moby Legacy (2023)
- Moby Love (1975)
- Moby Love 2 (1975)
- Moby Magic (1975)
- Moby Niki (1974)
- Moby Orli (1986)
- Moby Otta (1976)
- Moby Tommy (2002)
- Moby Vincent (1974)
- Moby Vinci (2024)
- Moby Wonder (2001)
- Moby Zazá (1982)
- Moliére (2002)
- Mongibello (1989)
- Mont St. Michel (2002)
- Monte Carlo (1972)
- Monte D´oro (1991)
- Monte Stello (1979)
- Moon Flower (1998)
- Morocco Star (1980)
- Muhumaa (2010)
- Mukran (1986)
- Munster (1970)
- Murillo (2002)
- Musthika Kencana II (1972)
- MyStar (2022)
- Møringen (1962)