Dumešić families are Croats and they are mostly from Ozalj. In the past century, relatively most of Croatian residents bearing this family name were born in Ozalj and Karlovac. In Tomašnica in Ozalj every seventh inhabitant had the family name Dumešić.
Prevalence
About 80 people with faimily name Dumešić live in Croatia today, in 30 households. There were 120 of them in the middle of the past century, and their number decreased by 30 percent. They are only located in in 7 Croatian cities and 6 other places, mostly in Mali Erjavec (40), Karlovac (15), Tomasnica (15), Tuskani (<10), and in Jasenovac in Novska area (<10).
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.