Lastovčić families are Croats and they are mostly from Samobor. In the past century, relatively most of Croatian residents bearing this family name were born in Samobor and Zagreb.
Prevalence
About 70 people with faimily name Lastovčić live in Croatia today, in 20 households. There were 60 of them in the middle of the past century, and their number increased by 10 percent. They are located in threee Croatian counties, threee cities and 6 other places, mostly in Samobor (60), Farkasevec Samoborski (10), Vrbovec Samoborski (<10), Domaslovec (<5), and in Zagreb (<5).
Outside Croatia
Family name Lastovčić is present in this form only in Croatia.
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.