Poljančić families are Croats and they are mostly from Delnice area. According to some sources they are from Slovenia (Gornja Kranjska). In the past century, relatively most of Croatian residents bearing this family name were born in Delnice area and in Rijeka.
Prevalence
About 100 people with faimily name Poljančić live in Croatia today, in 40 households. There were 100 of them in the middle of the past century, and their number remains constant. They are only located in in 10 Croatian cities and 5 other places, mostly in Zagreb (35), Ravna Gora in Delnice area (35), Rijeka (<10), Karlovac (<5), and in Delnice (<5).
Outside Croatia
Family name Poljančić is present in four 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.