STD Rates in Hillsborough County, New Hampshire
2023 CDC surveillance data for Hillsborough County, New Hampshire — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Hillsborough County has one of the higher STD burdens in New Hampshire, with a combined rate of 353.5 per 100,000 residents in 2023 — ranking 1st of 10 counties. Reported infections included chlamydia at 277.5 per 100,000 (1,186 cases, 41% above the state rate), gonorrhea at 71.8 per 100,000 (307 cases, 71% above the state rate), syphilis at 4.2 per 100,000 (18 cases, too few for a reliable comparison). Many STDs show no symptoms, so testing is the only reliable way to know your status. Confidential options are available across Hillsborough County.
STD Trends in Hillsborough County, 2000–2023
Reported cases per 100,000 residents each year, against the New Hampshire 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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Hillsborough County vs New Hampshire and the US
| Infection | Hillsborough County | New Hampshire | US | vs New Hampshire | vs US | Rank in New Hampshire |
|---|---|---|---|---|---|---|
| Chlamydia | 277.51,186 cases | 196.6 | 490.7 | 41.1% above | 43.4% below | 1st of 10 |
| Gonorrhea | 71.8307 cases | 41.9 | 178.2 | 71.4% above | 59.7% below | 1st of 10 |
| Syphilis (P&S) | 4.218 cases | 3.9 | 15.8 | Too few cases | Too few cases | – |
Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among New Hampshire’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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