In Croatia, Salja families are Croats (from Dugo Selo area ). In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb.
Prevalence
About 10 people with faimily name Salja live in Croatia today, in 6 households. There were 20 of them in the middle of the past century, and their number halved. They are located in only threee naselja i to in Zagreb (<10), Rijeka (<5), and in Oborovo in Dugo Selo area (<5).
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.