Jagnjić families are Croats and they are mostly from Sinj area. In the past century, relatively most of Croatian residents bearing this family name were born in Sinj and in Sinj area. In Gala in Sinj area every seventh inhabitant had the family name Jagnjić.
Prevalence
About 460 people with faimily name Jagnjić live in Croatia today, in 170 households. There were 260 of them in the middle of the past century, and their number increased by 80 percent. They are located in the most of Croatian counties, in 23 cities and 21 other places, mostly in Brnaze (100), Obrovac Sinjski (65), Gala in Sinj area (50), Zagreb (40), and in Sinj (35).
Outside Croatia
Family name Jagnjić is present in 7 countries on three continents. The family name "Jagnjic " is used by small number of people in Germany and small number 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.