Plačko families are Croats and they are mostly from Prelog area. According to other sources they are Slovaks. In the past century, relatively most of Croatian residents bearing this family name were born in Prelog area and in Zagreb.
Prevalence
About 90 people with faimily name Plačko live in Croatia today, in 40 households. There were 110 of them in the middle of the past century, and their number decreased by 20 percent. They are located in 9 Croatian counties, in 8 cities and 5 other places, mostly in Kotoriba in Prelog area (25), Zagreb (25), Krizevci (<10), Osijek (<10), and in Varazdin (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1933 in source Emigration Commission Zagreb.