In Croatia, Zelenko families are Croats (from Vinkovci area ). In the past century, relatively most of Croatian residents bearing this family name were born in Vinkovci area and in Koprivnica.
Prevalence
About 40 people with faimily name Zelenko live in Croatia today, in 19 households. There were 70 of them in the middle of the past century, and their number decreased by 40 percent. They are located in 8 Croatian counties, in 8 cities and 5 other places, mostly in Koprivnica (10), Zagreb (10), Slavonski Brod (<10), Vukovar (<10), and in Podgradje in Vinkovci area (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.