Kupres families are Croats and they are mostly from Samobor. In the past century, relatively most of Croatian residents bearing this family name were born in Samobor and Zagreb. In Cerje Samoborsko in Samobor every fourth inhabitant had the family name Kupres.
Prevalence
About 240 people with faimily name Kupres live in Croatia today, in 90 households. There were 210 of them in the middle of the past century, and their number increased by 20 percent. They are located in the most of Croatian counties, in 16 cities and 23 other places, mostly in Samobor (70), Cerje (45), Zagreb (20), Cerje Samoborsko (20), and in Slatina (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1928 in source Emigration Commission Zagreb.