In Croatia, Sapač families are predominantly Croats (from Rovinj ), rarely Slovenes (from Slovenia ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Slovenia and in Bjelovar.
Prevalence
About 20 people with faimily name Sapač live in Croatia today, in 8 households. There were 10 of them in the middle of the past century, and their number doubled. They are located in five Croatian cities only: in Rovinj (<10), Bjelovar (<10), Varazdin (<5), Pozega (<5), and in Dugo Selo (<5).
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.