This is a list of those who contributed to marxist theory, principally as authors; it is not intended to list politicians who happen(ed) to be a member of a nominally communist political party or other organisation.

• Theodor W. Adorno
• Louis Althusser
• Walter Benjamin
• Eduard Bernstein
• Bertolt Brecht
• Guy Debord
• Friedrich Engels
• Antonio Gramsci
• Max Horkheimer
• Fredric Jameson
• D. D. Kosambi
• Alexandra Kollontai
• Karl Kautsky
• Karl Korsch
• Hans-Jürgen Krahl
• Paul Lafargue
• Henri Lefebvre
• Vladimir Lenin
• Georg Lukacs
• Rosa Luxemburg
• José Carlos Mariátegui
• Paul Mattick
• Antonio Negri
• Anton Pannekoek
• Alfred Sohn-Rethel
• Karl August Wittvogel