Krstačić families are Croats and they are mostly from the Island of Rab. In the past century, relatively most of Croatian residents bearing this family name were born on the Island of Rab and in Rijeka.
Prevalence
About 140 people with faimily name Krstačić live in Croatia today, in 60 households. There were 100 of them in the middle of the past century, and their number increased by 40 percent. They are located in 6 Croatian counties, in 10 cities and 7 other places, mostly in Mundanije (35), Banjol (20) and Palit (15) on the Island of Rab, Pula (10), and in Veli Losinj on the Island of Losinj (10).
Outside Croatia
At least nine families with this surname emigrated from Croatia to: the United States (4), Germany (4), and to Australia (1). Family name Krstačić is present in three countries on two continents.
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.