Kalaš families are Croats and they are mostly from Kastela area. In the past century, relatively most of Croatian residents bearing this family name were born in Split and in Kastela area. In Grgići in Middle Bosnia every tenth inhabitant had the family name Kalaš.
Prevalence
About 130 people with faimily name Kalaš live in Croatia today, in 40 households. There were 100 of them in the middle of the past century, and their number increased by 30 percent. They are located in 6 Croatian counties, in 7 cities and 9 other places, mostly in Split (35), Karlovac (20), Kastel Sucurac (15), Zagreb (10), and in Zrnovnica (10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.