Vuljanić families are Croats and they are mostly from Karlovac. In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac and Ozalj. In Piščetke in Duga Resa area every sixth inhabitant had the family name Vuljanić.
Prevalence
About 210 people with faimily name Vuljanić live in Croatia today, in 80 households. There were 250 of them in the middle of the past century, and their number decreased by 20 percent. They are located in 7 Croatian counties, in 8 cities and 15 other places, mostly in Karlovac (80), Zadobarje (25), Grdun (15), Mali Erjavec (15), and in Duga Resa (15).
Outside Croatia
At least four families with this surname emigrated from Croatia to: Australia (2), the United States (1), and to Germany (1). Family name Vuljanić (including: Vuljanic , Vuljanich ) is present in 6 countries on four continents. The family name "Vuljanic " is used by some 50 people in the United States and small number in Germany.
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.