In Croatia, Širković families are Croats (from Trogir area ). In the past century, relatively most of Croatian residents bearing this family name were born in Split and on the Island of Brac.
Prevalence
About 20 people with faimily name Širković live in Croatia today, in 10 households. There were 20 of them in the middle of the past century, and their number remains constant. They are located in only five naselja i to in Split (10), Splitska on the Island of Brac (<10), Rogoznica in Trogir area (<10), Novalja on the Island of Pag (<5), and in Praznica on the Island of Brac (<5).