Siničić families are Croats and they are mostly from Pozega area. In the past century, relatively most of Croatian residents bearing this family name were born in Pozega area and in Split.
Prevalence
About 100 people with faimily name Siničić live in Croatia today, in 40 households. There were 80 of them in the middle of the past century, and their number increased by 20 percent. They are located in 6 Croatian counties, in 9 cities and 18 other places, mostly in Split (20), Omis (15), Pirovac in Vodice area (<10), Donji Dolac (<10), and in Srednji Lipovac in Pozega area (<10).
Outside Croatia
Family name Siničić 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 2007 in source Encyclopaedia of Croatian Surnames.