In Croatia, Augustin families are almost entirely Croats (from Novska ), barely Albanians (from Zagreb ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Novska. In Štefanci in Vrbovsko every third inhabitant had the family name Augustin.
Prevalence
About 50 people with faimily name Augustin live in Croatia today, in 20 households. There were 80 of them in the middle of the past century, and their number decreased by 40 percent. They are only located in in 6 Croatian cities and four other places, mostly in Zagreb (15), Novska (10), Petrinja (<10), Nova Gradiska (<10), and in Sisak (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.