Self-esteem is a widely investigated variable, across different countries and cultures. Levels of self-esteem seem to vary across cultures, and also cultural similarities and differences have been reported in several studies. Some aspects of age and gender differences seem to be universal across cultures. The aim of the present study was to assess age and gender patterns of self-esteem among Kosovo youth. The study sample included 4303 participants (four subsamples), 45.5% male and 54% female. The mean age of participants was 16.57 years (SD=2.99). The measuring instrument was the Rosenberg Self-Esteem Scale Albanian translation. Results indicated a slightly but not significantly higher level of self-esteem for men. The gender difference reached significance only for the age groups 18 to 22 years old and 23-29-years old. The study revealed developmental trajectories of self-esteem and gender patterns which are comparable to findings from other countries, although with some slight differences. Findings requires further investigation, particularly as regards the presence of any cohort effects in the findings. The study represents an important contribution to the investigation of self-esteem in Kosovo, and provides several directions for further research particularly as regards gender or developmental studies.