İstanbul based Fenerbahçe SK have developed a strong following since their founding in 1907
Many fanzines, blogs, podcasts, forums and fans websites have been dedicated to the club and the fans have long-standing rivalries with several other clubs; the most notable of these is with neighbours Galatasaray SK with whom they regularly contest the Intercontinental derby and Beşiktaş JK with whom they regularly contest the Istanbul derby.
Fenerbahçe SK's fans are well known for their good support, but have also been noted for bad and aggressive behavior.
Since rebuilding the Şükrü Saracoğlu Stadium, Fenerbahçe SK's average attendances have been in the top in Turkey. Fenerbahçe SK have a number of supporters organisations, including Genç Fenerbahçeliler (GFB), Kill For You (KFY), UniFeb (Fenerbahçe Supporters of University Students), Group CK (Cefakâr Kanaryalar), Vamos Bien, Antu/Fenerlist, EuroFeb, Boğaz Hooligans (Bosphorus Hooligans), Anglofeb/FENatics, and SUADFEB.
The supporters motto is Hep Destek Tam Destek, abbreviated as HDTD (English: Continuous Unwavering Support, Spanish: Te Apoyo Siempre, Te Apoyo Entodo).
Fenerbahçe SK's longest-running and deepest rivalry is with their nearest major neighbours, Galatasaray SK, with matches between the two being referred to as Intercontinental derby.
Matches against other Istanbul sides, such as Beşiktaş JK are also derbys, but the rivalry is not as intense as that between Fenerbahçe SK and Galatasaray SK.