Čuljak families are Croats and they are mostly from Herzegovina (Klobuk near Ljubuski). In the past century, relatively most of Croatian residents bearing this family name were born in Herzegovina (Mostar area) and in Herzegovina (Ljubuski area). In Ploča in Rama (Bosnia) every third inhabitant had the family name Čuljak.
About 1600 people with faimily name Čuljak live in Croatia today, in 610 households. There were 100 of them in the middle of the past century, and their number multiplied. They are located in almost all Croatian counties, in 59 cities and 121 other places, mostly in Zagreb (385), Sesvete (95), Osijek (90), Slavonski Brod (80), and in Split (75).