In Croatia, Biasiol families are predominantly Italians (from Pula area ), rarely Croats (also from Pula area ), and barely Slovenes (from the Island of Losinj ). In the past century, relatively most of Croatian residents bearing this family name were born in Pula and in Pula area.
About 50 people with faimily name Biasiol live in Croatia today, in 20 households. There were 190 of them in the middle of the past century, and their number decreased significantly. They are located in only five naselja i to in Vodnjan in Pula area (25), Rijeka (<10), Pula (<10), Nerezine on the Island of Losinj (<5), and in Barban in Labin area (<5).