In Croatia, Stubljar families are almost entirely Croats (from Ozalj area ), barely Slovenes (from Karlovac ). In the past century, relatively most of Croatian residents bearing this family name were born in Ozalj area and in Karlovac. In Jugovac in Ozalj area every sixth inhabitant had the family name Stubljar.
Prevalence
About 40 people with faimily name Stubljar live in Croatia today, in 19 households. There were 60 of them in the middle of the past century, and their number decreased by 30 percent. They are located in threee Croatian counties, four cities and 5 other places, mostly in Karlovac (10), Donje Taboriste (<10), Novo Seliste (<5), Sopcic Vrh in Ozalj area (<5), and in Zagreb (<5).
Outside Croatia
Family name Stubljar is present in five countries on three continents. The family name "Stubljar " 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 few times, the first time 1924 in source Emigration Commission Zagreb.