In Croatia, Zorco families are predominantly Croats (from Rijeka ), rarely Italians (also from Rijeka ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka.
Prevalence
Only a few people with faimily name Zorco live in Croatia today, in three households only. There were 20 of them in the middle of the past century, and their number halved. They are located in one Croatian city only, in Rijeka (<10).
Outside Croatia
Family name Zorco is present in 13 countries on four continents. The family name "Zorco " is used by few people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.