About 860 people with faimily name Markulin live in Croatia today, in 360 households. There were 900 of them in the middle of the past century, and their number remains constant. They are located in all Croatian counties, in 42 cities and 74 other places, mostly in Zagreb (175), Lasinja in Jastrebarsko area (60), Rumin in Sinj area (55), Zadar (35), and in Velika Gorica (35).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over thirty times, the first time 1902 in source Hartmann's General List of Apartments in Zagreb.