ClubLocationLeagueTierFounded
MC Oran—Algerian Ligue Professionnelle 1—1946
MC Oujda—Botola 2—1946Maghreb Fès—Botola—1946
Maldon & Tiptree—Isthmian League - North Division—1946Malvern Town—Southern League - Division One South—1946
Manama Club—Bahraini Premier League—1946
Marchtrenk—Landesliga Ost - Oberösterreich—1946
Marcos Trincado—Campeonato Regional - Rengo—1946
Marlin Coast Rangers—Football Queensland Far North & Gulf—1946
Marmande 47—Régional 1 - Nouvelle-Aquitaine—1946
Maryland Terrapins—NCAA Division I—1946
Mazara—Eccellenza Sicilia—1946
Mazur Ełk—IV Liga - Warmińsko-Mazurska—1946
Melilla CF—Dissolved 1976—1946
Merelbeke—Belgian National Division 1 - VV—1946
Metalac Sisak—1. ŽNL Sisačko-Moslavačka—1946Meux—Belgian Division 2 - ACFF—1946
Milicionar—Dissolved 2001—1946
Millonarios—Categoría Primera A—1946
Minatori—Liga e Tretë e Kosovës—1946
Mitsubishi Mizushima—Chūgoku Soccer League—1946Mladost Lukićevo—PFL Zrenjanin—1946Mladost Petrinja—3. NL - Središte—1946
Mladost Rogatica—Druga Liga RS - Istok—1946Molesey—Combined Counties League - Division One—1946
Montfoort—Dissolved 2019—1946
Město Albrechtice—I. A Třída Moravskoslezského Kraje—1946