Objective: To investigate epidemiological features of genital Chlamydia trachomatis(Ct) infection among youth aged 15-24 years in Beijing, so as to provide scientific basis for developing control strategies. Methods: Data regarding genital Ct infection among youth aged 15-24 years were collected from the disease surveillance information reporting system in Beijing between 2010 and 2019 and were analyzed with the descriptive epidemiological method. Results: During 2010-2019, a total of 1 871 cases of Ct infection was reported, 1 287(68.79%) of the cases were female. The reported incidence rate of genital Ct infection increased from 3.16 per 100 000 in 2010 to 25.15 per 100 000 in 2019, with an average annual increasing rate of 25.92%( χ 2=836.86, P < 0.01 ). Increasing trends in the reported incidence were observed among males and females, females being higher than males in the year 2010 and 2012. The reported incidence rates increased annually in all age groups between 2010 and 2019, and the average annual rate of increase was highest in the group aged 15-19 years. Conclusion The reported rate of genital Ct infection showed an increasing trend among youth aged 15-24 years in Beijing, and increased rapidly among youth aged 15-24 years. More attention should be paid on sexual and reproductive health education among adolescents. Epidemic of genital Ct infection should be concerned, and its surveillance need to be improved.