In Croatia, Šimica families are Croats (from Duga Resa area ).
Prevalence
Only a few people with faimily name Šimica live in Croatia today, in two households only. There were 20 of them in the middle of the past century, and their number decreased significantly. They are located in only two Croatian places: in Bjelovar (<5) and Straza in Duga Resa area (<5).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 1931 in source Emigration Commission Zagreb.