Koretić families are Croats and they are mostly from Varazdinske Toplice area. In the past century, relatively most of Croatian residents bearing this family name were born in Varazdinske Toplice area and in Zagreb. In Popovec Kalnički in Varazdinske Toplice area every second inhabitant had the family name Koretić.
Prevalence
About 130 people with faimily name Koretić live in Croatia today, in 50 households. There were 190 of them in the middle of the past century, and their number decreased by 30 percent. They are located in 7 Croatian counties, in 8 cities and 14 other places, mostly in Popovec Kalnicki in Varazdinske Toplice area (40), Zagreb (25), Krizevci (15), Obrez Kalnicki in Varazdinske Toplice area (<10), and in Guscerovec in Krizevci area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.