Marko families are Croats and they are mostly from Slatina area. In the past century, relatively most of Croatian residents bearing this family name were born in Slatina area and in Osijek.
Prevalence
About 100 people with faimily name Marko live in Croatia today, in 40 households. There were 110 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 22 cities and 9 other places, mostly in Osijek (20), Ilok (15), Crnac in Slatina area (15), Zagreb (15), and in Lipovljani in Novska area (<10).
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.