Trpčić families are Croats and they are mostly from Karlovac. In the past century, relatively most of Croatian residents bearing this family name were born in Karlovac and Zagreb.
Prevalence
About 100 people with faimily name Trpčić live in Croatia today, in 50 households. There were 110 of them in the middle of the past century, and their number decreased by 0 percent. They are only located in four Croatian cities and 8 other places, mostly in Karlovac (55), Gornje Stative (30), Zagreb (10), Pozega (<10), and in Koprivnica (<5).
Outside Croatia
Family name Trpčić (including: Trpchich , Trpcic ) is present in three countries on two continents. The family name "Trpcic " is used by small number of people in the United States and small number in Canada.
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.