Ričko families are Croats and they are mostly from Zlatar area. According to some sources they are from Ukrajine. In the past century, relatively most of Croatian residents bearing this family name were born in Zlatar area and in Zagreb. In places Pece and Krapinica in Zlatar area every sixth inhabitant had the family name Ričko.
Prevalence
About 270 people with faimily name Ričko live in Croatia today, in 100 households. There were 160 of them in the middle of the past century, and their number increased by 70 percent. They are located in the most of Croatian counties, in 16 cities and 31 other places, mostly in Pece in Zlatar area (60), Zagreb (55), Strmec in Samobor area (20), Krapinica in Zlatar area (15), and in Gornji Kraljevec in Novi Marof area (10).
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.