This is a list of the club members of each of the clubs in Spain. The list is slightly outdated as I know Barca have over 160,000 now and also Madrid have a weird system where they could have so many more but these are the figures according to the LFP website....
Barcelona - 155428
Real Madrid 90699
Valencia - 44962
Sevilla - 42309
Atletico Madrid - 42000
Betis - 39500
Bilbao 34373
Espanyol - 29150
Deportivo 22722
Valladolid 18007
Villarreal - 17340
Recre 17050
Racing Santander - 16505
Osasuna - 15016
Real Mallorca - 15000
Almeria - 14600
Sporting Gijon 14000
Getafe - 12000
Malaga 11734
Numancia - 4100
Los Beticos are suprisingly high, they've got a strong gypsy following. Bilbao should probably be higher and Villarreal and Getafe are relatively new to the scene.
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