Korša families are Croats and they are mostly from Novi Marof area. In the past century, relatively most of Croatian residents bearing this family name were born in Novi Marof area and in Zagreb.
Prevalence
About 130 people with faimily name Korša live in Croatia today, in 50 households. There were 150 of them in the middle of the past century, and their number decreased by 10 percent. They are located in 7 Croatian counties, in 7 cities and 21 other places, mostly in Zagreb (35), Mala Branjska in Koprivnica area (10), Draskovic in Novi Marof area (<10), Sesvete (<10), and in Breznicki Hum in Novi Marof area (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.