In Croatia, Stipanec families are almost entirely Croats (from Sisak ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Sisak.
Prevalence
About 40 people with faimily name Stipanec live in Croatia today, in 16 households. There were 60 of them in the middle of the past century, and their number decreased by 30 percent. They are located in four Croatian counties, four cities and 5 other places, mostly in Topolovac (20), Sisak (15), Hrastelnica (<10), Jastrebarsko (<5), and in Preloscica (<5).
Outside Croatia
At least one family with this surname emigrated from Croatia to the United States. Family name Stipanec is present in this form only in Croatia.
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.