This work presents a survey of the attitudes of students at the Faculty of Political Science in Zagreb on the granting of Croatian citizenship. The research can be divided into two parts. In the first part, the aim was to investigate students' attitudes about the criteria for granting citizenship, attitudes about granting citizenship to foreigners with regard to their socio-demographic characteristics and ethnicity, and to check and describe differences in these attitudes with regard to gender, religiosity and ideological orientation. In the second part of the study, the aim was to check the relationship between the selected variables. In this context, the relationship between attitudes about the criteria for granting Croatian citizenship and attitudes about Croatian national identity and the relationship between the perception of security and cultural threats of individual ethnic groups and attitudes about granting citizenship to those same groups is examined. The analysis showed that students do not place emphasis on the ethnic criterion for granting Croatian citizenship and also do not have an ethnic conception of national identity, but as an important criterion they emphasize respect for Croatian culture and customs. Also, at the level of specific issues, students preferred a group that is ethnically closer and the question is whether their rejection of the established ethno-national identification in Croatia is more declarative in nature. Furthermore, they showed relative openness to different groups of individuals, with certain exceptions that can be explained by the perception of security and cultural threat. Differences in attitudes regarding certain socio-demographic characteristics of students were also confirmed, and the openness of those who have show weakest ethnic criteria for granting Croatian citizenship was shown. Finally, the idea of the conducted research was to offer a basis for future more extensive research, given that no other research has been conducted on this topic in Croatia.