In Croatia, Sila families are almost entirely Croats (from Ozalj ), barely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Ozalj and Zagreb.
Prevalence
About 60 people with faimily name Sila live in Croatia today, in 30 households. There were 90 of them in the middle of the past century, and their number decreased by 40 percent. They are located in 6 Croatian counties, in 6 cities and 5 other places, mostly in Zagreb (20), Mahicno (15), Karlovac (10), Rijeka (<10), and in Zadobarje (<5).
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.