ClubLocationLeagueTierFounded
Maccabi București—Dissolved in 1948—1919
Makkabi Brno—Dissolved in 1950—1919
Maleš—3. MFL - Istok—1919
Manzanese—Prima Categoria FVG—1919
Marcílio Dias—Campeonato Catarinense - Série A—1919
Marl—Dissolved in 2011—1919Massese—Eccellenza Toscana—1919
Mačva Šabac—PLS—1919
Metropolitan Police—Isthmian League - South Central Division—1919
Minyor Pernik—Vtora Liga—1919
Montargis—Régional 2 - Centre-Val de Loire—1919
Monte Carasso—4. Liga - FTC—1919Montebelluna—Serie D - Girone C—1919Montpellier HSC—Ligue 2—1919
Moslavina—4. NL Središte Zagreb - B—1919
Móri SE—MB I - Fejér—1919