About 430 people with faimily name Šustić live in Croatia today, in 190 households. There were 340 of them in the middle of the past century, and their number increased by 30 percent. They are located in the most of Croatian counties, in 27 cities and 33 other places, mostly in Zagreb (55), Split (50), Petrinja (40), Primorski Dolac in Trogir area (40), and in Kastel Stari (30).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over twenty times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.