STD Rates in Mercer County, Pennsylvania
2023 CDC surveillance data for Mercer County, Pennsylvania — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Mercer County has one of the higher STD burdens in Pennsylvania, with a combined rate of 453.5 per 100,000 residents in 2023 — ranking 10th of 67 counties. Reported infections included chlamydia at 326.3 per 100,000 (354 cases, 23% below the state rate), gonorrhea at 124.4 per 100,000 (135 cases, 14% below the state rate), syphilis at 2.8 per 100,000 (3 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 Mercer County.
STD Trends in Mercer County, 2000–2023
Reported cases per 100,000 residents each year, against the Pennsylvania 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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Mercer County vs Pennsylvania and the US
| Infection | Mercer County | Pennsylvania | US | vs Pennsylvania | vs US | Rank in Pennsylvania |
|---|---|---|---|---|---|---|
| Chlamydia | 326.3354 cases | 421.2 | 490.7 | 22.5% below | 33.5% below | 15th of 67 |
| Gonorrhea | 124.4135 cases | 144.7 | 178.2 | 14% below | 30.2% below | 7th of 67 |
| Syphilis (P&S) | 2.83 cases | 9.1 | 15.8 | Too few cases | Too few cases | – |
Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among Pennsylvania’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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