About 800 people with faimily name Valjak live in Croatia today, in 320 households. There were 780 of them in the middle of the past century, and their number remains constant. They are located in almost all Croatian counties, in 32 cities and 96 other places, mostly in Zagreb (245), Sesvete (35), in Kolarec (25) and Vinicno (25) in Novi Marof area, and in Bojnikovec (20).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.