Sušak families are Croats and they are mostly from Herzegovina. In the past century, relatively most of Croatian residents bearing this family name were born in Herzegovina (Capljina area) and in Metkovic.
Prevalence
About 110 people with faimily name Sušak live in Croatia today, in 50 households. There were 130 of them in the middle of the past century, and their number decreased by 20 percent. They are located in 9 Croatian counties, in 13 cities and threee other places, mostly in Metkovic (40), Zagreb (25), Split (20), Slavonski Brod (<10), and in Bjelovar (<10).
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.