In Croatia, Karlovac families are Croats (from Bjelovar area ). In the past century, relatively most of Croatian residents bearing this family name were born in Bjelovar and in Bjelovar area.
Prevalence
About 50 people with faimily name Karlovac live in Croatia today, in 30 households. There were 70 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 9 Croatian counties, in 7 cities and 7 other places, mostly in Zagreb (15), Srijedska in Bjelovar area (<10), Kokinac (<10), Ivanska in Bjelovar area (<10), and in Bjelovar (<5).
Outside Croatia
Family name Karlovac is present in 6 countries on three continents. The family name "Karlovac " 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 over five times, the first time 1917 in source List of Dignitaries, Officials and Public Servants of the Kingdom of Croatia-Slavonia.