The biggest fan base in Milan are at the San San Siro. The ground for both the MILAN TEAMs.
The English club Manchester united has the largest fan base in the world, Real Madrid comes second.
Manchester United
1-Real Madrid With 183 millions fan
Manchester United have the most registered fan on any database accounting people associated with any football club worldwide, 2008 figure was 412 million. ( 412,000,000 )
fc Barcelona
hillsborough
It is Manchester United.
Real Madrid
15827
Portishead united football club 12000 km2
chivas
The Bristol City Football Club is the premiership club closest to Bristol. You should check them out if you are a big football fan. They are quite interesting.