Chlamydia: Rates of reported cases by age group and sex, United States, 2023

In the United States in 2023, the rate of reported chlamydia was higher among women compared with men. Among women, those aged 20 to 24 years had the highest rate of reported cases of chlamydia, followed by women aged 15 to 19 years and women aged 25 to 29 years. Among men, those aged 20 to 24 years also had the highest rate of reported cases of chlamydia, followed by men aged 25 to 29 years and men aged 15 to 19 years.

This report includes data from years that coincide with the COVID-19 pandemic, which introduced uncertainty and difficulty in interpreting STI surveillance data. Refer to the CDC's Impact of COVID-19 on STIs for more information.