STD Rates in Middlesex County, New Jersey
2023 CDC surveillance data for Middlesex County, New Jersey — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Middlesex County recorded a combined STD rate of 360.4 per 100,000 residents in 2023, ranking 12th of 21 counties in New Jersey. Reported infections included chlamydia at 289.5 per 100,000 (2,500 cases, 25% below the state rate), gonorrhea at 66.0 per 100,000 (570 cases, 40% below the state rate), syphilis at 4.9 per 100,000 (42 cases, 40% below the state rate). Confidential STD testing is available throughout Middlesex County — knowing your status is the only way to catch infections that often show no symptoms.
STD Trends in Middlesex County, 2000–2023
Reported cases per 100,000 residents each year, against the New Jersey 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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Middlesex County vs New Jersey and the US
| Infection | Middlesex County | New Jersey | US | vs New Jersey | vs US | Rank in New Jersey |
|---|---|---|---|---|---|---|
| Chlamydia | 289.52,500 cases | 384.1 | 490.7 | 24.6% below | 41% below | 12th of 21 |
| Gonorrhea | 66570 cases | 109.1 | 178.2 | 39.5% below | 63% below | 12th of 21 |
| Syphilis (P&S) | 4.942 cases | 8.1 | 15.8 | 39.5% below | 69% below | 13th of 21 |
Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among New Jersey’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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