Citluk is a town and municipality located in Herzegovina, in southern Bosnia and Herzegovina. It is a municipality of the Herzegovina-Neretva Cantonin the Federation of Bosnia and Herzegovina.
The municipality includes the village of Međugorje where Marian apparitions have been reported.
Other nearby towns are Sluzanj, Potpolje, Blatnica, Cerin, Hamzići and Ograđenik. The rich soil in this area is used for growing wine-producing grapes. Many varieties grown in Brotnjo are popular throughout the world (e.g., Blatina)