Bižaca families are Croats and they are mostly from the Island of Brac. In the past century, relatively most of Croatian residents bearing this family name were born in Split and on the Island of Brac.
Prevalence
About 90 people with faimily name Bižaca live in Croatia today, in 40 households. There were 80 of them in the middle of the past century, and their number increased by 10 percent. They are located in 6 Croatian counties, in 11 cities and 6 other places, mostly in Postira on the Island of Brac (30), Split (30), Zagreb (<10), Stari Grad on the Island of Hvar (<10), and in Valpovo (<5).
Outside Croatia
At least one family with this surname emigrated from Croatia to the United States. Family name Bižaca (including: Bizaca , Bizzaca , Bizazza and Bizaza ) is present in 8 countries worldwide. The family name "Bizaca " is used by small number of people in the United States.
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.