In Croatia, Klemenc families are predominantly Croats (from Donji Miholjac area ), very rarely Slovenes (from Osijek ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Osijek and Rijeka.
Prevalence
About 30 people with faimily name Klemenc live in Croatia today, in 15 households. There were 20 of them in the middle of the past century, and their number increased by 80 percent. They are located in 6 Croatian counties, in 9 cities and 6 other places, mostly in Rijeka (<10), Slavonski Brod (<5), Cres on the Island of Cres (<5), Icici (<5), and in Samatovci in Valpovo area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 1926 in source Emigration Commission Zagreb.