In Croatia, Sencich families are Croats (from Rijeka ). In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka.
Prevalence
Only a few people with faimily name Sencich live in Croatia today, in one household only. There were 10 of them in the middle of the past century, and their number decreased significantly. They are located in only two naselja i to in Podkilavac (<5) and Martinovo Selo (<5) in Rijeka area.
Outside Croatia
Family name Sencich is present in three countries on two continents. The family name "Sencich " 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 1906 in source Yearbook and Directory of Literary Society of St. Jerome 1906.