In Croatia, Klis families are predominantly Croats (from Dubrovnik area ), very rarely Bosniaks, and . In the past century, relatively most of Croatian residents bearing this family name were born in Dubrovnik area and in Dubrovnik.
Prevalence
About 20 people with faimily name Klis live in Croatia today, in 6 households. There were 20 of them in the middle of the past century, and their number remains constant. They are only located in in one Croatian city and 5 other places, mostly in Petraca (<10) and Soline (<5) in Dubrovnik area, Dubrovnik (<5), Ston on the Peljesac peninsula (<5), and in Mlini in Dubrovnik area (<5).