Relja families are usually Croats and they are mostly from Zadar area , rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Sibenik and Split.
About 410 people with faimily name Relja live in Croatia today, in 170 households. There were 290 of them in the middle of the past century, and their number increased by 50 percent. They are located in the most of Croatian counties, in 23 cities and 35 other places, mostly in Zagreb (70), Split (60), Zadar (35), Sibenik (30), and in Donji Muc in Sinj area (20).