Chlamydia is the most commonly reported infectious disease in the city of Philadelphia. Rates of reported chlamydia infection are consistently higher in women than in men, and are highest in the 15- to 19-year-old age group. Untreated chlamydia may lead to PID, infertility, and increase the chance of ectopic pregnancy.

Posting of this data is intended for the sole purpose of promoting the health of Philadelphia residents. The Philadelphia Department of Public Health (PDPH) attempts to post accurate and reliable information, but does not guarantee that the surveillance data is complete or up-to-date. PDPH assumes no responsibility for any errors, omissions or other discrepancies in these electronically posted files. Information from this site may not be copyrighted, nor used for commercial purposes.

The following graphs and tables depict selected aggregate results of PDPH’s chlamydia surveillance.

Tabular Raw Data

Chlamydia Counts Over Time

Reported cases of chlamydia by age, 1998-2020

Rates Of Chlamydia Per 100K By Age And Gender









Updated: 8/11/2021