Forko families are Croats and they are mostly from Sveti Ivan Zelina. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Sveti Ivan Zelina. In Ladislavec in Zlatar every eighth inhabitant had the family name Forko.
Prevalence
About 210 people with faimily name Forko live in Croatia today, in 90 households. There were 240 of them in the middle of the past century, and their number decreased by 10 percent. They are located in the most of Croatian counties, in 16 cities and 27 other places, mostly in Zagreb (45), Gornja Drenova (20), Adamovec (20), Marija Bistrica in Zlatar area (15), and in Ladislavec (15).
Outside Croatia
Family name Forko is present in 14 countries worldwide. The family name "Forko " is used by some 90 people in Liberia , small number in Germany , and small number of 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 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.