Boltužić families are Croats and they are mostly from Sisak. In the past century, relatively most of Croatian residents bearing this family name were born in Sisak and Petrinja. In Donja Mlinoga in Petrinja every fourth inhabitant had the family name Boltužić.
Prevalence
About 140 people with faimily name Boltužić live in Croatia today, in 60 households. There were 90 of them in the middle of the past century, and their number increased by 60 percent. They are only located in in 6 Croatian cities and 16 other places, mostly in Sisak (25), Petrinja (20), Zagreb (20), Donja Mlinoga (15), and in Donja Budicina (10).
Outside Croatia
Family name Boltužić 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 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.