No county in the United States has a higher rate of STD cases than Hinds County, Mississippi, where there are 2,253.2 STD cases per 100,000 state residents. Not only that, but the highest rate of STD cases by state is also found in Mississippi, where there are 1,291.4 STD cases per 100,000 state residents. From the team at NYRequirements comes this infographic that looks at which counties and states have the highest rates of STD cases in the United States. The data comes from the CDC's NCHHSTP AtlasPlus, and found that the states with the highest STD rates (cases per 100,000 state residents) includes Mississippi (1,291.4 cases), Louisiana (1,058.0 cases), South Carolina (999.8 cases), Alaska (990.8 cases), North Carolina (898.3 cases), Alabama (857.2 cases), Oklahoma (842.9 cases), Tennessee (836.6 cases), Georgia (826.9 cases) and New Mexico (818.4 cases). In the United States, the most common form of STD is Chlamydia. In just 2020, 1.577 million cases of it were reported to the CDC.