Topolovac families are Croats and they are mostly from Bosnian Posavina. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Bosanian Posavina (Odzak area).
Prevalence
About 150 people with faimily name Topolovac live in Croatia today, in 70 households. There were 250 of them in the middle of the past century, and their number decreased by 40 percent. They are located in the most of Croatian counties, in 16 cities and 17 other places, mostly in Zagreb (55), Oriovac in Pleternica area (10), Sveti Ivan Zabno in Krizevci area (10), Zapresic (<10), and in Duga Resa (<10).
Outside Croatia
Family name Topolovac is present in 10 countries on three continents. The family name "Topolovac " is used by small number of people in Germany , small number in the United States , and small number of people in Turkey.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1927 in source Emigration Commission Zagreb.