Košarkaški klub Mornar (Cyrillic: Кошаркашки клуб Морнар), commonly referred to as Mornar Barsko zlato for sponsorship reasons, is a men's professional basketball club based in Bar, Montenegro. The club competes in the Montenegrin Basketball League and the ABA League.
The team also plays in international competitions. Mornar made its European debut in the Basketball Champions League during the 2016–17 season. Mornar won its first domestic title the following year in the 2017–18 Montenegrin League.
In the 2015–16 season, Mornar managed to reach the Balkan League and Montenegrin League Finals but lost both. In the 2016–17 season, Mornar returned to European competition when it qualified for the Basketball Champions League regular season. The club also made its debut in the Adriatic League.
In its second ABA League season, the club qualified for the semifinals. In the playoff semifinals, Mornar was eliminated by Crvena zvezda, 2–1.
On 30 May 2018, Mornar achieved its first league ever by defeating Budućnost in the 2017–18 Montenegrin League finals.
In December 2020, the club became a shareholder of the Adriatic Basketball Association, following a transfer of shares from MZT Skopje Aerodrom.
On 11 September 2021, the club announced a change of their name to Mornar Barsko zlato for sponsorship reasons.