Cities in the south such as Montgomery, Ala., Memphis, Tenn., and Richmond, Va., dominate the higher reaches of the list, but you just can't hold down Philly.
The data used here comes from the CDC for 2013, and reflects reports of syphilis, gonorrhea and chlamydia. (Herpes data is not collected). To normalize the data, we measured rates per 100,000 people. We chose only to show cities with a significant amount of population, so rural counties are not show on this map. The CDC makes available a wide range of statistical, anonymous data about STDs in America.
The map was created and produced by RentApplication.com.