In Croatia, Piuko families are Italians by relative majority (from Lipik ), rarely Bosniaks (from Pula ), and . In the past century, relatively most of Croatian residents bearing this family name were born in Umag.
Prevalence
Only a few people with faimily name Piuko live in Croatia today, in two households only. They are located in only threee Croatian places: in Pomer in Pula area (<10), Pula (<5), and in Strizicevac (<5).
Outside Croatia
Family name Piuko (including: Piucco , Piuco ) is present in 9 countries on four continents. "Piuco " is used by small number of people in the United States.