HKK Brotnjo Čitluk (full Croatian name: Hrvatski košarkaški klub Brotnjo Čitluk, English: Croatian Basketball Club Brotnjo Čitluk) is a Croat-founded basketball team from the town of Čitluk, Bosnia and Herzegovina. It was established in 1977.
The club plays in the Basketball Championship of Bosnia and Herzegovina. It has previously experienced success in the Herzeg Bosnia Basketball League. The club also participated in the Korać Cup in 1995 and 1999.
The fans are known as "Grdani".