| José-Luis Munuera | | 2005–2019 | plot, script, pencils, ink | | 4 |
| Judie Clarke | Italy | 2005–2019 | plot, script, pencils, ink | | 4 |
| Julio Berríos | Chile | 1968–1970 | plot, script, pencils, ink | | 4 |
 | Jussi Olsen | Denmark | 1977–1983 | plot, script | | 4 |
| Kai Saarto | | 2003–2007 | plot, script | | 4 |
| Kati Kovács | | 1992–2019 | plot, script, pencils, ink | | 4 |
| Kevin Campbell | United States | 1992–1993 | plot, script | | 4 |
| Koko Seitz | | 1992–2001 | plot, script, pencils, ink | | 4 |
| 盛久美子 (Kumiko Mori) | | 2009 | pencils, ink | | 4 |
| La redazione di Topolino | | 2006–2007 | plot, script | | 4 |
| Larry Gotterer | United States | 1984–1988 | plot, script | | 4 |
| Laurent Ducrettet | | 2021 | pencils, ink | | 4 |
| Lauri Rintamäki | | 2021–2023 | plot, script, pencils, ink | | 4 |
| Lea Hernandez | United States | 1992–1994 | pencils, ink | | 4 |
| Leo Seconi | | 2013 | plot, script | | 4 |
| Lesley “Leirix” Li | | 2023 | pencils, ink | | 4 |
| Lilja Leskinen | | 2023 | plot, script, pencils, ink | | 4 |
| Lino de Albergaria | | 1991 | plot, script | | 4 |
| Lotte Nybo | Denmark | 1990–1992 | plot, script | | 4 |
| Louie De Martinis | United States | 2006–2008 | pencils, ink | | 4 |
| Luca Merli | | 2021–2025 | plot, script | | 4 |
 | Luca Raffaelli | Italy | 1993–2022 | plot, script | | 4 |
| Lucas Libanio | | 2021–2022 | script, pencils | | 4 |
| Matteo Sonz | | 2013–2023 | plot, script | | 4 |
| Mago Blu | | 1935 | plot, script | | 4 |
| Malte Morgenstern | | 2018–2019 | plot, script | | 4 |
| Marc Bühler | Netherlands | 1984–2002 | plot, script | | 4 |
| Marc Davis | | 2001–2014 | plot, script, pencils, ink | | 4 |
| Marc Degens | | 1989–2000 | plot, script | | 4 |
| Marcel Termes | | 2025–2026 | plot, script | | 4 |
| Marcelo Cassaro | Brazil | 1994–1995 | plot, script | | 4 |
| Maria Carosella | | 2025–2026 | plot, script | | 4 |
| Marilyne Letertre | | 2022–2024 | plot, script | | 4 |
 | Mark Waid | United States | 2009–2010 | plot, script | | 4 |
| Marty Greim | United States | 1975–1986 | plot, script, pencils, ink | | 4 |
| Massimo Sardi | Italy | 1996–1997 | plot, script, ink | | 4 |
| Massimo Zammattaro | Italy | 1990–1994 | plot, script | | 4 |
| Matleena 11 v | | 2023 | plot, script, pencils, ink | | 4 |
| Matt Negrete | United States | 1997–2001 | plot, script | | 4 |
 | Matt Wagner | United States | 2009 | pencils, ink | | 4 |
| Matteo Lolli | | 2023–2024 | pencils, ink | | 4 |
| Mattia Guberti | Italy | 2008–2010 | pencils, ink | | 4 |
| Mel Morteyrol | | 1986–1988 | plot, script | | 4 |
| Michael Avon Oeming | United States | 2009 | pencils, ink | | 4 |
| Michael Jensen | Denmark | 1994–1997 | plot, script, pencils, ink | | 4 |
| Michael Kompa | Germany | 1994–2015 | plot, script, pencils, ink | | 4 |
| Michael Machatschke | | 1982–1990 | plot, script | | 4 |
| Michael Zettler | | 1978–1994 | plot, script, pencils, ink | | 4 |
| Michele Miglionico | | 2011–2013 | plot, script | | 4 |
| Mike Peraza | United States | 1991–2019 | plot, script, pencils, ink | | 4 |
| Mike Shoykhet | | 2006–2008 | pencils, ink | | 4 |
| Milena Ciccarello | | 2026 | pencils, ink | | 4 |
| Miriam Dubini | Italy | 2007–2015 | plot, script | | 4 |
| 鷲尾直広 (Naohiro Washio) | | 2011 | plot, script, pencils, ink | | 4 |
| National Cartoon Co | | 1995–1996 | plot, script | | 4 |
| Nick Firfires | United States | 1955–1958 | pencils, ink | | 4 |
| Nicola Cornacchione | Italy | 1981–1983 | plot, script | | 4 |
| Nicola Morante | Italy | 1998–2001 | ink | | 4 |
| Olaf Oldigs | | 1978–1981 | plot, script | | 4 |
| Olivier Supiot | | 2017–2019 | plot, script, pencils, ink | | 4 |