STD Rates in Suffolk County, Massachusetts
2023 CDC surveillance data for Suffolk County, Massachusetts — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Suffolk County has one of the higher STD burdens in Massachusetts, with a combined rate of 1,321.4 per 100,000 residents in 2023 — ranking 1st of 14 counties. Reported infections included chlamydia at 891.3 per 100,000 (6,849 cases, 116% above the state rate), gonorrhea at 403.7 per 100,000 (3,102 cases, 189% above the state rate), syphilis at 26.4 per 100,000 (203 cases, 149% 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 Suffolk County.
STD Trends in Suffolk County, 2000–2023
Reported cases per 100,000 residents each year, against the Massachusetts 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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Suffolk County vs Massachusetts and the US
| Infection | Suffolk County | Massachusetts | US | vs Massachusetts | vs US | Rank in Massachusetts |
|---|---|---|---|---|---|---|
| Chlamydia | 891.36,849 cases | 412.7 | 490.7 | 116% above | 81.6% above | 1st of 14 |
| Gonorrhea | 403.73,102 cases | 139.8 | 178.2 | 188.8% above | 126.5% above | 1st of 14 |
| Syphilis (P&S) | 26.4203 cases | 10.6 | 15.8 | 149.1% above | 67.1% above | 1st of 14 |
Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among Massachusetts’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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