Grošinić 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 Sveti Ivan Zelina and Zagreb. In Gornje Orešje in Sveti Ivan Zelina every fourth inhabitant had the family name Grošinić.
Prevalence
About 130 people with faimily name Grošinić live in Croatia today, in 50 households. There were 190 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 8 Croatian counties, in 7 cities and 23 other places, mostly in Gornje Oresje (30), Vrtlinska (20), Zagreb (15), Sveti Ivan Zelina (15), and in Zvonik in Cazma area (<10).
Outside Croatia
Family name Grošinić is present in this form only in Croatia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1923 in source Emigration Commission Zagreb.