The aim of this thesis is to examine the connection between the 5C model of positive youth development and its components (confidence, competence, character, connection and caring) and anxiety symptoms in adolescents in Croatia. In addition, gender differences in the expression of anxiety symptoms were also examined, as well as gender differences in the connection between the expressed anxiety symptoms and the factors of the 5C model of positive development. The research was conducted as part of the larger scientific project "Testing the 5c model of positive youth development: traditional and digital mobile measurement" (P.R.O.T.E.C.T.), which is carried out by the Faculty of Education and Rehabilitation in Zagreb, and in this work a sample of 312 participants was used. Anxiety symptoms were examined using the anxiety subscale from the Depression, Anxiety and Stress Scale-21 (Depression, Anxiety and Stress Scale-21: DASS-21; Lovibond, Lovibond, 1995). The short version of the "Positive Youth Development Questionnaire" (PYD-SF; Geldhof I et al., 2014) was used to examine the positive development characteristics of young people. The obtained results indicate that 61.5% of adolescents do not express symptoms of anxiety, but also that 38.5% of the examined adolescents show certain anxiety symptoms. A statistically significant difference in the level of expressed anxiety symptoms was found between boys and girls, with a higher prevalence of anxiety symptoms in girls. Furthermore, it was determined that there is a statistically significant negative correlation between indicators of positive development of young people (competence, confidence, caring) and symptoms of anxiety, that is, adolescents who have more developed characteristics of positive development show fewer symptoms of anxiety. However, a significant level of association was not found for character and caring. Gender differences in the level of connection between the characteristics of positive development and symptoms of anxiety indicate that in boys all indicators of positive development are statistically significantly negatively correlated with symptoms of anxiety, while in girls a statistically significant connection was found only between the characteristic of confidence and connection. A positive but not statistically significant correlation was found between caring and anxiety symptoms in girls.