Runtas 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.
Prevalence
About 180 people with faimily name Runtas live in Croatia today, in 60 households. There were 130 of them in the middle of the past century, and their number increased by 40 percent. They are located in two Croatian counties, four cities and 18 other places, mostly in Samobor (55), Dubrava Samoborska (40), Bregana (20), Gornji Stupnik in Samobor area (10), and in Rude (10).
Outside Croatia
Family name Runtas is present in five countries on three continents. The family name "Runtas " is used by some 70 people in the United States , small number in Canada , and small number of people in Indonesia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1929 in source Emigration Commission Zagreb.