St. Pauli
Has to be a Barcelona Jersey biggest club in the world largest fan base makes sense. Improved Answer: No, It would be Real Madrid or Manchester United which are the two biggest soccer clubs.
Manchester united
Manchester United
Liverpool
chivas
ATLETICO NACIONAL
Fenerbahce SK
Rangers
Manchester united
Sure Besiktas - carsi
AIK Solna, Hammarby, Djurgården, Malmö, IFK Göteborg
None of them have offical fan clubs