Lacko families are Croats and they are mostly from Virovitica area. In the past century, relatively most of Croatian residents bearing this family name were born in Zagreb and in Zabok area. In Galovec Začretski in Zabok area every seventh inhabitant had the family name Lacko.
Prevalence
About 320 people with faimily name Lacko live in Croatia today, in 110 households. There were 270 of them in the middle of the past century, and their number increased by 20 percent. They are located in the most of Croatian counties, in 19 cities and 32 other places, mostly in Zagreb (50), Galovec Zacretski in Zabok area (35), Trnovec in Varazdin area (30), Kapela Dvor in Virovitica area (25), and in Sesvete (15).
In the sources analysed in the project Acta Croatica so far, the name is mentioned over thirty times, the first time 1691 in source Catholic Church Parish Records.