In Croatia, Acs families are predominantly Croats (from Sisak ), rarely Hungarians (from Vinkovci ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Osijek and Sisak.
Prevalence
About 10 people with faimily name Acs live in Croatia today, in 6 households. There were 10 of them in the middle of the past century, and their number remains constant. They are located in three Croatian cities only: in Sisak (<5), Vinkovci (<5), and in Osijek (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.