River Plate and Boca Juniors among clubs with most members at 2025 Club World Cup
According to Transfermarkt data, Argentina's two giants rank top 4 in membership numbers among tournament participants.
Bayern Munich and Benfica lead with 400k members each. River Plate follows in third (351k) with Boca Juniors fourth (323k)
Alongside Palmeiras (7th, 197k), they're the only South American clubs in the top 10 - completed by Borussia Dortmund, Inter Milan, Porto, Atlético Madrid and Juventus
Notably absent are recent UCL winners: Real Madrid (93k, 12th behind Flamengo), while PSG and Manchester City operate without traditional membership systems
