STD Rates in Philadelphia County, Pennsylvania
2023 CDC surveillance data for Philadelphia County, Pennsylvania — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Philadelphia County has one of the higher STD burdens in Pennsylvania, with a combined rate of 1,850.7 per 100,000 residents in 2023 — ranking 1st of 67 counties. Reported infections included chlamydia at 1265.9 per 100,000 (19,628 cases, 201% above the state rate), gonorrhea at 553.5 per 100,000 (8,583 cases, 283% above the state rate), syphilis at 31.3 per 100,000 (486 cases, 244% above the state rate). Many STDs show no symptoms, so testing is the only reliable way to know your status. Confidential options are available across Philadelphia County.
STD Trends in Philadelphia 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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Philadelphia County vs Pennsylvania and the US
| Infection | Philadelphia County | Pennsylvania | US | vs Pennsylvania | vs US | Rank in Pennsylvania |
|---|---|---|---|---|---|---|
| Chlamydia | 1265.919,628 cases | 421.2 | 490.7 | 200.5% above | 158% above | 1st of 67 |
| Gonorrhea | 553.58,583 cases | 144.7 | 178.2 | 282.5% above | 210.6% above | 1st of 67 |
| Syphilis (P&S) | 31.3486 cases | 9.1 | 15.8 | 244% above | 98.1% above | 1st 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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