The article presents the lives and activities of the population that moved to Zadar from areas located in present-day Slovenia. The gathered data stems from the archival material kept in the State Archives in Zadar and is associated with the activities and work of immigrants from areas of present-day Slovenia in the upper secondary school Croatian Gimnazija in Zadar, which operated from 1897 to 1921. Along with the teaching personnel, the structure of students who stated Slovene as their mother tongue and the data on their parents will also be observed. Based on the available data, we shall draw conclusions as to some of the reasons for the arrival of the population from present-day Slovenia to the area of Zadar and demonstrate its inclusion in the then Zadar society.