Poslek families are Croats and they are mostly from Klanjec. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Klanjec. In Gredice in Klanjec every ninth inhabitant had the family name Poslek.
Prevalence
About 190 people with faimily name Poslek live in Croatia today, in 70 households. There were 190 of them in the middle of the past century, and their number remains constant. They are located in 9 Croatian counties, in 16 cities and 19 other places, mostly in Zagreb (60), Gredice (45), Klanjec (10), and in Desinic Gora (<10) and Hum Kosnicki (<10) in Pregrada area.
Outside Croatia
Family name Poslek is present in four countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.