In Croatia, Mušica families are almost entirely Croats (from Krapina area ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Zabok and in Krapina area.
Prevalence
About 50 people with faimily name Mušica live in Croatia today, in 15 households. There were 60 of them in the middle of the past century, and their number decreased by 10 percent. They are only located in threee Croatian cities and 9 other places, mostly in Donje Vino in Krapina area (15), Zagreb (<10), in Klupci (<10) and Krapinske Toplice (<10) in Krapina area, and in Sveti Kriz Zacretje in Zabok area (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.