Radaljac families are Croats and they are mostly from Ploce. In the past century, relatively most of Croatian residents bearing this family name were born in Metkovic and Ploce.
Prevalence
About 100 people with faimily name Radaljac live in Croatia today, in 50 households. There were 80 of them in the middle of the past century, and their number increased by 20 percent. They are located in 7 Croatian counties, in 13 cities and 5 other places, mostly in Ploce (65), Split (<10), Zagreb (<10), Pula (<5), and in Opuzen (<5).
Outside Croatia
Family name Radaljac is present in four countries on three continents. The family name "Radaljac " is used by few people in Australia and few 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 2007 in source Encyclopaedia of Croatian Surnames.