Krajnik families are Croats and they are mostly from Zlatar area. In the past century, relatively most of Croatian residents bearing this family name were born in Zlatar area and in Zagreb. In Vinipotok in Zlatar area every fifth inhabitant had the family name Krajnik.
Prevalence
About 160 people with faimily name Krajnik live in Croatia today, in 60 households. There were 130 of them in the middle of the past century, and their number increased by 30 percent. They are located in 7 Croatian counties, in 9 cities and 16 other places, mostly in Zagreb (35), in Vinipotok (35), Lobor (15) and Persaves (10) in Zlatar area, and in Varazdin (<10).
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.