Čustović families are mainly Bosniaks and they are mostly from east Herzegovina , whereas often Croats (from Dubrovnik ). In the past century, relatively most of Croatian residents bearing this family name were born in Dubrovnik and in East Herzegovina (Gacko area).
About 130 people with faimily name Čustović live in Croatia today, in 50 households. There were 20 of them in the middle of the past century, and their number multiplied. They are located in 6 Croatian counties, in 6 cities and 7 other places, mostly in Dubrovnik (100), Zagreb (20), Mokosica (<10), Split (<10), and in Blace in Opuzen area (<5).