Šemper families are Croats and they are mostly from Sisak area. According to some sources they are from Italy. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Sisak area.
About 80 people with faimily name Šemper live in Croatia today, in 30 households. There were 140 of them in the middle of the past century, and their number decreased by 50 percent. They are located in 7 Croatian counties, in 7 cities and 5 other places, mostly in Sesvete (20), Lijeva Martinska Ves in Sisak area (20), Zagreb (15), Koprivnica (10), and in Virovitica (<10).