| Konstantin | |
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| Nickname: | The Emperors |
| Leagues: | Second League of Serbia |
| History: | KK Sinđelić 2009–2011 OKK Konstantin 2011–present |
| Arena: | Čair Sports Center |
| Capacity: | 4,000 |
| Location: | Niš, Serbia |
| Colors: | Red, White and Blue |
| President: | Zvonko Milošević |
| Coach: | Milan Tubić |
Omladinski košarkaški klub Konstantin (Serbian: Омладински кошаркашки клуб Константин), commonly referred to as OKK Konstantin or simply Konstantin, is a men's professional basketball club based in Niš, Serbia. They are currently competing in the Second Basketball League of Serbia.
See main article: Čair Sports Center. Konstantin plays their domestic home games at the Čair Sports Center, located in Niš. It has a seating capacity of 4,000.[1]
* Petar Ćirić
Jovica Antonić (2011–2012)[2] Boško Đokić (2012–2013) Marko Cvetković (2013–2016) Predrag Jaćimović (2016–2017) Marko Cvetković (2017) Slobodan Nikolić (2018) Marko Cvetković (2018–2020) Dušan Radović (2020–2021)[3] Ljubiša Damjanović (2021–present)