STD Rates in Norfolk County, Massachusetts
2023 CDC surveillance data for Norfolk County, Massachusetts — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Norfolk County recorded a combined STD rate of 369.8 per 100,000 residents in 2023, ranking 10th of 14 counties in Massachusetts. Reported infections included chlamydia at 274.9 per 100,000 (2,000 cases, 33% below the state rate), gonorrhea at 90.0 per 100,000 (655 cases, 36% below the state rate), syphilis at 4.9 per 100,000 (36 cases, 54% below the state rate). Many STDs show no symptoms, so testing is the only reliable way to know your status. Confidential options are available across Norfolk County.
STD Trends in Norfolk 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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Norfolk County vs Massachusetts and the US
| Infection | Norfolk County | Massachusetts | US | vs Massachusetts | vs US | Rank in Massachusetts |
|---|---|---|---|---|---|---|
| Chlamydia | 274.92,000 cases | 412.7 | 490.7 | 33.4% below | 44% below | 10th of 14 |
| Gonorrhea | 90655 cases | 139.8 | 178.2 | 35.6% below | 49.5% below | 8th of 14 |
| Syphilis (P&S) | 4.936 cases | 10.6 | 15.8 | 53.8% below | 69% below | 11th 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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