Ivašković families are Croats and they are mostly from Srijem , Vojvodina. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Srijem, Vojvodina. In Paučje in Djakovo area every thirtieth inhabitant had the family name Ivašković.
Prevalence
About 80 people with faimily name Ivašković live in Croatia today, in 40 households. There were 60 of them in the middle of the past century, and their number increased by 50 percent. They are located in the most of Croatian counties, in 18 cities and 8 other places, mostly in Zagreb (45), Djurdjevac (<10), Osijek (<10), Borovo in Vukovar area (<10), and in Kokinac (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.