Pleško families are Croats and they are mostly from Krapina area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Bjelovar.
Prevalence
About 330 people with faimily name Pleško live in Croatia today, in 140 households. There were 360 of them in the middle of the past century, and their number decreased by 10 percent. They are located in the most of Croatian counties, in 23 cities and 42 other places, mostly in Zagreb (80), Cepelovac (30), Ferdinandovac in Djurdjevac area (25), Djurdjevac (25), and in Mala Erpenja in Krapina area (25).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over thirty times, the first time 1669 in source Catholic Church Parish Records.