Omladinski košarkaški klub Beograd (Serbian Cyrillic: Омладински кошаркашки клуб Београд), commonly referred to as OKK Beograd, is a men's professional basketball club based in Belgrade, Serbia. They are currently competing in the Basketball League of Serbia. It is part of the multi-sports Belgrade-based sport club OSD Beograd. The club is the league affiliate of Mega Basket.

Quick Facts Nickname, Leagues ...

OKK Beograd
Nickname	Klonferi
Leagues	Basketball League of Serbia
Founded	25 February 1945; 79 years ago (1945-02-25)
History	KK Metalac (1945–1950) KK BSK (1950–1958) OKK Beograd (1958–present)
Arena	Mega Factory
Capacity	700
Location	Belgrade, Serbia
Team colors	Blue, White
President	Aleksa Milošević
Head coach	Vule Avdalović
Affiliation(s)	Mega Basket
Championships	4 Yugoslav Leagues 3 Yugoslav Cups
Website	okkbeograd.org.rs
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The club was founded in 1945 as KK Metalac. In 1950, the club changed its name to KK BSK, and then in 1958 to OKK Beograd, which it keeps to this day.^[1] The OKK Beograd squads have won 4 National League championships. They have played three different National League since 1945, including the Yugoslav First Federal League (1945–1992), the First League of Serbia and Montenegro (1992–2006), and the Serbian League (2006 onward). They have also won 3 National Cup titles.

The club has its own Hall of Fame. The members are Radivoj Korać, Slobodan Gordić, Bogomir Rajković, Trajko Rajković, Miodrag Nikolić, Milorad Erkić, and Borislav Stanković.^[2] Several members of the club have been inducted into the FIBA Hall of Fame, including player Korać, coach Aleksandar Nikolić and contributors Radomir Šaper and Stanković. Stanković and Korać are members of the Basketball Hall of Fame.

OKK Beograd made most of its achievements during a so-called 'golden era' - a period between 1957 and 1965. The key players of this generation were Radivoj Korać, Slobodan Gordić, Bogomir Rajković, Trajko Rajković, Miodrag Nikolić and Milorad Erkić who would later be the coach of the women's squad, and longtime coordinator of the OKK youth program. They developed under the guidance of coaches Borislav Stanković and Aleksandar Nikolić and team director Radomir Šaper, and went on to win six national trophies and achieve high results in European competitions. In less than a decade, OKK Beograd won four Yugoslav League championships; in 1958, 1960, 1963 and 1964, accompanied by two Yugoslav Cups in 1960 and 1962. The club also reached the semifinals of a European Champions Cup on three occasions, but failed to reach the finals, losing to Academic Sofia in 1959, Spartak Brno in 1964 and Real Madrid in 1965. After 1965, the core of the team went abroad and the results dropped. However, the club did reach the finals of the first-ever Korać Cup in 1972 but lost to another Yugoslav club, Cibona (known at the time as Lokomotiva). Although OKK Beograd remained among the top Serbian and Yugoslav teams, the next trophy was not won until 1993, with the victory in the Yugoslav Cup.

On June 14, 2018, the club signed a contract on sports and technical cooperation with Adriatic League team Mega Basket.^[3][4]

The club has had several denominations through the years due to its sponsorship:

• Beko Beograd: 1974–1979
• InvestEksport Beograd: 1993–1994

• 1945–1950
• 1950–1958
• 1958–present
• Alternate logo

• Šumice Hall
• Radivoj Korać Hall (2016–present)
• Mega Factory Hall (2018–present)