Runko families are Croats and they are mostly from Pazin area. In the past century, relatively most of Croatian residents bearing this family name were born in Pula and Labin.
Prevalence
About 130 people with faimily name Runko live in Croatia today, in 60 households. There were 190 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 6 Croatian counties, in 9 cities and 23 other places, mostly in Pula (40), Labin (10), Pazin (10), and in Krsan (<10) and Lazarici (<10) in Labin area.
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.