Vlahek 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 Zagreb and in Zlatar area. In Završje Loborsko in Zlatar area every seventh inhabitant had the family name Vlahek.
Prevalence
About 470 people with faimily name Vlahek live in Croatia today, in 190 households. There were 430 of them in the middle of the past century, and their number increased by 10 percent. They are located in the most of Croatian counties, in 22 cities and 45 other places, mostly in Zagreb (100), Donji Kraljevec in Prelog area (75), Zavrsje Loborsko in Zlatar area (60), Varazdin (15), and in Cakovec (15).
Outside Croatia
Family name Vlahek is present in 7 countries on three continents. The family name "Vlahek " is used by small number of people in the United States and small number in Austria.
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.