In the past century, relatively most of Croatian residents bearing this family name were born in Slavonski Brod.
Prevalence
Only a few people with faimily name Krušac live in Croatia today, in households. There were 10 of them in the middle of the past century, and their number remains constant. They are located in only two Croatian places: in Zagreb (<5) and Ugljan on the Island of Ugljan (<5).
Outside Croatia
Family name Krušac is present in two countries on two continents. The family name "Krusac " is used by some 90 people in the United States.
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.