In Croatia, Klačić families are Croats (from Cazma ). In the past century, relatively most of Croatian residents bearing this family name were born in Cazma and Zagreb.
Prevalence
About 40 people with faimily name Klačić live in Croatia today, in 20 households. There were 50 of them in the middle of the past century, and their number decreased by 20 percent. They are only located in in 9 Croatian cities and 9 other places, mostly in Zagreb (<10), Bjelovar (<10), Krizic in Bjelovar area (<5), Martinac (<5), and in Zapresic (<5).
Outside Croatia
Family name Klačić is present in three countries on three continents. The family name "Klacic " is used by small number of people in the Philippines and small number in the United States.
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.