Mihelja families are Croats and they are mostly from Krapina area. In the past century, relatively most of Croatian residents bearing this family name were born in Krapina area and in Zagreb.
Prevalence
About 80 people with faimily name Mihelja live in Croatia today, in 30 households. There were 30 of them in the middle of the past century, and their number more than doubled. They are located in four Croatian counties, two cities and 8 other places, mostly in Zagreb (30), Mala Erpenja in Krapina area (25), in Novoselec (10) and Okesinec (<10) in Ivanic-Grad area, and in Sesvete (<5).
Outside Croatia
Family name Mihelja (including: Michellia , Michelia and Michaellia ) is present in 6 countries on four continents.