Oštrek families are Croats and they are mostly from Novi Marof. In the past century, relatively most of Croatian residents bearing this family name were born in Novi Marof and Varazdin.
Prevalence
About 90 people with faimily name Oštrek live in Croatia today, in 30 households. There were 70 of them in the middle of the past century, and their number increased by 20 percent. They are located in 7 Croatian counties, in 6 cities and 8 other places, mostly in Donje Makojisce (15), Novi Marof (15), Grana (10), Karlovac (<10), and in Madzarevo (<10).
Outside Croatia
Family name Oštrek (including: Ostrek , Ostrec ) is present in 7 countries on two continents.
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1942 in source Phone Directory of the Independent State of Croatia 1942.