Glavašić families are Croats and they are mostly from Valpovo area. In the past century, relatively most of Croatian residents bearing this family name were born in Valpovo area and in Osijek.
Prevalence
About 90 people with faimily name Glavašić live in Croatia today, in 30 households. There were 70 of them in the middle of the past century, and their number increased by 20 percent. They are located in four Croatian counties and 7 other places, mostly in Bizovac in Valpovo area (65), Tovarnik in Ilok area (15), Valpovo (10), Osijek (<10), and in Belisce (<10).
Outside Croatia
Family name Glavašić (including: Glavasic , Glavasich ) is present in three countries on two continents. "Glavasich " is used by small number of people in the United States.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over ten times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.