Toplak families are mainly Croats and they are mostly from Varazdin area , rarely Slovenes. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Varazdin.
Prevalence
About 410 people with faimily name Toplak live in Croatia today, in 170 households. There were 430 of them in the middle of the past century, and their number remains constant. They are located in the most of Croatian counties, in 34 cities and 47 other places, mostly in Zagreb (110), Varazdin (35), Remetinec (30), Prigorje in Krapina area (15), and in Valentinovo (10).
Outside Croatia
At least four families with this surname emigrated from Croatia to the United States. Family name Toplak is present in 20 countries worldwide.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.