Špralja families are Croats and they are mostly from Zaglav on Dugi (Long) Island. In the past century, relatively most of Croatian residents bearing this family name were born on Dugi, Long Island and in Zadar. In Zaglav on Dugi (Long) Island every third inhabitant had the family name Špralja.
Prevalence
About 160 people with faimily name Špralja live in Croatia today, in 70 households. There were 150 of them in the middle of the past century, and their number increased by 10 percent. They are located in 8 Croatian counties, in 10 cities and 7 other places, mostly in Zadar (85), Zaglav on Dugi (Long) Island (60), Rijeka (<10), Split (<10), and in Osijek (<5).
Outside Croatia
Family name Špralja is present in this form only in Croatia.
In the sources analysed in the project Acta Croatica so far, the name is mentioned over five times, the first time 2007 in source Encyclopaedia of Croatian Surnames.