In Croatia, Gromić families are predominantly Croats (from Virovitica area ), rarely Bosniaks (from Bosnian Posavina ). In the past century, relatively most of Croatian residents bearing this family name were born in Bosanian Posavina (Gradacac area).
Prevalence
Only a few people with faimily name Gromić live in Croatia today, in three households only. They are located in two Croatian counties, in one city and another small place , mostly in Suhopolje in Virovitica area (<5) and Pula (<5).