Busija families are Croats and they are mostly from Ludbreg. In the past century, relatively most of Croatian residents bearing this family name were born in Ludbreg and Gospic.
About 200 people with faimily name Busija live in Croatia today, in 90 households. There were 280 of them in the middle of the past century, and their number decreased by 30 percent. They are located in the most of Croatian counties, in 13 cities and 28 other places, mostly in Ludbreg (40), Zagreb (20), Pokupsko in Glina area (20), Bilaj (20), and in Velika Gorica (10).
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.