Grmača families are Croats and they are mostly from middle Bosnia. In the past century, relatively most of Croatian residents bearing this family name were born in Middle Bosnia (Kakanj area) and in Middle Bosnia (Sarajevo area). In Grab in Herzegovina nearly every inhabitant had the family name Grmača.
Prevalence
About 130 people with faimily name Grmača live in Croatia today, in 40 households. They are located in the most of Croatian counties, in 14 cities and 16 other places, mostly in Gracac in Knin area (35), Momici in Opuzen area (15), Zagreb (<10), Trogir (<10), and in Velika Gorica (<10).