Šoštarko families are Croats and they are mostly from Krapina area. In the past century, relatively most of Croatian residents bearing this family name were born in Krapina area and in Zagreb. In Čret in Krapina area every eighth inhabitant had the family name Šoštarko.
Prevalence
About 180 people with faimily name Šoštarko live in Croatia today, in 70 households. There were 220 of them in the middle of the past century, and their number decreased by 20 percent. They are located in the most of Croatian counties, in 14 cities and 11 other places, mostly in Zagreb (70), Cret in Krapina area (45), Lepajci (15), Osijek (15), and in Krapinske Toplice in Krapina area (<10).
Outside Croatia
Family name Šoštarko is present in this form only in Croatia.
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.