In Croatia, Kosinjski families are generally Croats (from Samobor area ), very rarely Serbs. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Daruvar area.
Prevalence
About 10 people with faimily name Kosinjski live in Croatia today, in 6 households. They are located in only four naselja i to in Zagreb (<10), Gornji Stupnik in Samobor area (<5), Sesvete (<5), and in Stupnicki Obrez in Samobor area (<5).
Outside Croatia
Family name Kosinjski is present in three countries on two continents. "Kosiniski " is used by few people in the United States.