İstanbul Başakşehir F.K.
|Full name||İstanbul Başakşehir FK|
|Founded||15 June 1990|
|Ground||Başakşehir Fatih Terim Stadium,
|2013–14||First League, 1st (Promoted)|
|Website||Club home page|
İstanbul Başakşehir Futbol Kulübü, formerly called İstanbul Büyükşehir Belediyespor or Istanbul BB, is a Turkish football club. They play their home games at the Başakşehir Stadi in Istanbul and is owned by the Municipality of Istanbul. The club was founded in 1990. Club's former name was ISKI SK and owned by Municipality's water distribution company. ISKI SK competed in Regional Amateur Football League in 1990-1991 season and promoted to 3rd League. After promotion, the club's name changed to Istanbul BB. The club played in TFF First League until 1996, but after the 2006–2007 season they were promoted to the Turkcell Super League. Finishing 12th in the 2007–2008 season enabled them to remain in the Turkcell Süper Lig for the 2008–2009 season. In the 2009–2010 season, the club finished the season 6th place with a historical success at its own. In the 2012-2013 season, the club finished 16th and relegated to TFF First League. But, it finished 1st League as champions and made immediate return to top level in 2013-14 season. In June 2014, the club's name changed to İstanbul Başakşehir Futbol Kulübü.
Fan group Boz Baykuşlar
IBB hardly had any supporters, despite playing in the country's largest stadium every home game felt like an away match. For years the Atatürk Olympic Stadium was the centerpiece to a strange spectacle, the only supporters in the stands would be fans of opposition teams. However, over time the team has won over some followers and they founded a supporter group called the, ‘Boz Baykuşlar’ (Grey Owls). 
They are one of the most unusual supporter groups in Turkey, their numbers are small and they never engage in hooliganism, violence or insulting the opposition. They are renowned for their witty slogans, "Bize her yer deplasman!" (Everywhere is away for us), "Hakem haklı beyler!" (The referee is right, guys), ‘Maç Var Dediler Geldik!’ (They said there was a game being played so we thought we’d come along).
It is unknown if the group will stay with the club after the name-change.
- Turkish Super League: 2007–2013, 2014-
- TFF First League: 1993-95, 1996-07, 2013-14
- TFF Second League: 1991-93, 1995–96
Note: Flags indicate national team as defined under FIFA eligibility rules. Players may hold more than one non-FIFA nationality.
- Ugur Tütüneker (2004–05)
- Abdullah Avcı (Aug 2006–Nov 11)
- Arif Erdem (Nov 2011–May 12)
- Carlos Carvalhal (May 2012–Nov 12)
- Bülent Korkmaz (Nov 2012–May 13)
- Cihat Arslan (Aug 2013-May 14)
- Abdullah Avcı (Aug 2014–)
-  IBB Team profile and Turkish club and football news (English)