📸 Galatasaray SK, Türkiye football club: Photo Gallery (Photo: 12)

Galatasaray Spor Kulübü (Turkish pronunciation: [galataˈsaɾaj spoɾ kuˈlyby], Galatasaray Sports Club), usually referred to as Galatasaray, is a Turkish professional football club based in the district of Sarıyer, in the European side of Istanbul. It is the association football branch of the larger Galatasaray Sports Club of the same name, itself a part of the Galatasaray Community Cooperation Committee which includes Galatasaray High School where the football club was founded in 1905, consisting entirely of students. The team plays in dark shades of red and yellow at home, with the shirts split down the middle between the two colours.

Galatasaray is one of three teams to have participated in all seasons of the Süper Lig since 1959, following the dissolution of the Istanbul Football League. Galatasaray has the most Süper Lig (25), Turkish Cup (19) and Turkish Super Cup (17) titles in Turkey. Galatasaray is the most successful Turkish club in European competitions. Galatasaray won the UEFA Cup and UEFA Super Cup in 2000, becoming the only Turkish team to win a major UEFA competition. In the 1999–2000 season, the club achieved the rare feat of completing a treble by winning the Süper Lig, Turkish Cup, and UEFA Cup in a single season. In the UEFA Champions League, Galatasaray has reached the quarter-finals several times and the semi-finals of Club Champions Cup once. Galatasaray is the only Turkish club to have been ranked first on the IFFHS World Rankings. According to IFFHS, Galatasaray is the best Turkish club of the 20th century, and the 20th most successful club in Europe. As of 2025, they have the 2nd position in UEFA coefficient among Turkish teams.

Since 2011, the club's stadium has been the 53,798-capacity Rams Park in the Seyrantepe district of Istanbul. Previously, the club played at the Ali Sami Yen Stadium, as well as a succession of other grounds in Istanbul, which included groundshares with Beşiktaş J.K. and Fenerbahçe at the Taksim Stadium and İnönü Stadium.

The club has a long-standing rivalry with other Istanbul teams, namely Beşiktaş and Fenerbahçe. The derby between Galatasaray and Fenerbahçe is dubbed the Kıtalar Arası Derbi (English: Intercontinental Derby) due to the location of their stadiums on the European (Galatasaray) and Asian (Fenerbahçe) sides of the Bosphorus strait.