STD Rates in Union County, South Carolina
2023 CDC surveillance data for Union County, South Carolina — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Union County reported a combined STD rate of 927.6 per 100,000 residents in 2023, placing it 19th of 46 South Carolina counties — in the upper half of the state. Reported infections included chlamydia at 657.2 per 100,000 (175 cases, 7% above the state rate), gonorrhea at 244.1 per 100,000 (65 cases, 10% above the state rate), syphilis at 26.3 per 100,000 (7 cases, too few for a reliable comparison). Many STDs show no symptoms, so testing is the only reliable way to know your status. Confidential options are available across Union County.
STD Trends in Union County, 2000–2023
Reported cases per 100,000 residents each year, against the South Carolina rate (dashed). In a county this size a handful of cases moves the rate a long way, so read the shape rather than any single year.
Source: CDC NCHHSTP AtlasPlus county surveillance, 2000–2023.
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Union County vs South Carolina and the US
| Infection | Union County | South Carolina | US | vs South Carolina | vs US | Rank in South Carolina |
|---|---|---|---|---|---|---|
| Chlamydia | 657.2175 cases | 612.1 | 490.7 | 7.4% above | 33.9% above | 18th of 46 |
| Gonorrhea | 244.165 cases | 222.4 | 178.2 | 9.8% above | 37% above | 19th of 46 |
| Syphilis (P&S) | 26.37 cases | 17.3 | 15.8 | Too few cases | Too few cases | – |
Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among South Carolina’s counties. The US rate is all 50 states combined. Comparisons are left out where fewer than 20 cases were reported, because a rate built on so few cases can swing widely from one year to the next.
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