In Croatia, Susak families are mainly Bosniaks (from Middle Bosnia ), equally Croats (from Koprivnica area ). In the past century, relatively most of Croatian residents bearing this family name were born in Bosnian Krajina (Kotor Varos area). In Radava in Middle Bosnia every second inhabitant had the family name Susak.
About 20 people with faimily name Susak live in Croatia today, in 6 households. They are located in only five Croatian places: in Vrhovac Sokolovacki in Koprivnica area (15), Zagreb (<10), and in Ivancec (<5), Rasinja (<5) and Veliki Poganac (<5) in Koprivnica area.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.