STD Rates in Allegheny County, Pennsylvania
2023 CDC surveillance data for Allegheny County, Pennsylvania — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Allegheny County has one of the higher STD burdens in Pennsylvania, with a combined rate of 642.7 per 100,000 residents in 2023 — ranking 5th of 67 counties. Reported infections included chlamydia at 431.3 per 100,000 (5,283 cases, 2% above the state rate), gonorrhea at 200.4 per 100,000 (2,455 cases, 38% above the state rate), syphilis at 11.0 per 100,000 (135 cases, 21% above the state rate). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Allegheny County has confidential testing locations available.
STD Trends in Allegheny 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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Allegheny County vs Pennsylvania and the US
| Infection | Allegheny County | Pennsylvania | US | vs Pennsylvania | vs US | Rank in Pennsylvania |
|---|---|---|---|---|---|---|
| Chlamydia | 431.35,283 cases | 421.2 | 490.7 | 2.4% above | 12.1% below | 7th of 67 |
| Gonorrhea | 200.42,455 cases | 144.7 | 178.2 | 38.5% above | 12.5% above | 3rd of 67 |
| Syphilis (P&S) | 11135 cases | 9.1 | 15.8 | 20.9% above | 30.4% below | 5th of 67 |
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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