In Croatia, Štagljar families are Croats (from Hrvatska Kostajnica area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and Sisak. In Bistrač in Hrvatska Kostajnica area every ninth inhabitant had the family name Štagljar.
Prevalence
About 50 people with faimily name Štagljar live in Croatia today, in 20 households. There were 80 of them in the middle of the past century, and their number decreased by 40 percent. They are located in 6 Croatian counties, four cities and 8 other places, mostly in Zagreb (10), Velika Mlaka (<10), Sisak (<10), Bribir in Novi Vinodolski area (<5), and in Topolovac (<5).
Outside Croatia
Family name Štagljar is present in five countries on three continents. The family name "Stagljar " is used by small number of people in Switzerland , small number in Canada , and small number of people in the United States.
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.