Planinčić families are frequently Croats and they are mostly from Samobor , less frequently Bosniaks. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Samobor. In Suhi Dol in Middle Bosnia every third inhabitant had the family name Planinčić.
Prevalence
About 90 people with faimily name Planinčić live in Croatia today, in 40 households. There were 70 of them in the middle of the past century, and their number increased by 30 percent. They are located in 9 Croatian counties, in 13 cities and 5 other places, mostly in Zagreb (35), Rude (30), Samobor (<10), Kutina (<5), and in Crikvenica (<5).
Outside Croatia
Family name Planinčić is present in 11 countries on four 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.