Introduction. The problem of studying civic identity is relevant in the context of modern social changes affecting the development of the younger generation of our country. Adolescence requires special attention in the study of civic identity and its components, particularly the subjective assessment of knowledge related to civic identity as a criterion of the cognitive component. This is due to the sensitivity of identity formation in early (15–18 years old) and late (19-23 years old) youth. The instability of the civic position, coupled with exposure to external influences, creates a risk of developing negative forms of civic self-determination. The aim of the study. To identify the dynamics of the factor structure of the subjective assessment of their knowledge related to civic identity among young people of adolescent age during their transition from the early period of adolescence (15-18 years) to the late (19-23 years). Methods. The “I know” questionnaire by I.V. Kozhanov was modified (the Cronbach's alpha coefficient is 0.86). The results were analysed using factor analysis with the statistical analysis package SPSS Statistics 22.00 for Windows. The study sample consisted of 280 young people (students) from Arkhangelsk in the early and late periods of adolescence. Results. The dynamics of the factor structure of the subjective assessment of one's knowledge as a criterion of the cognitive component of civic identity in the transition of young people from early to late adolescence was identified and described; the leading components of civic identity in the content of the factor structure in the periods of early and late adolescence were identified. Conclusions. Qualitative changes in the factor structure of the subjective assessment of knowledge about civic identity during the transition from early to late adolescence are manifested by: 1) increasing the overall information content of the identified factor structure, 2) distributing knowledge about the structural components of civic identity more evenly, and 3) shifting the focus of knowledge from the all-Russian to the ethnic component of civic identity as they grow older.