Delaware ranks 21st in the U.S. for STD rates, with 757.2 cases per 100,000 people. The state's chlamydia rate is 12th highest nationally, while its gonorrhea rate is 6th highest. New Castle ...

In the study, southern states dominated the top of the list for STD rates. Louisiana, Mississippi, Alaska, and Georgia all reported over 1,000 cases per 100,000 residents.