STD Rates in Belknap County, New Hampshire
2023 CDC surveillance data for Belknap County, New Hampshire — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Belknap County is among the lower-burden counties in New Hampshire, reporting a combined STD rate of 152.2 per 100,000 residents in 2023 — 9th of 10 counties. Reported infections included chlamydia at 130.7 per 100,000 (85 cases, 34% below the state rate), gonorrhea at 20.0 per 100,000 (13 cases, too few for a reliable comparison), syphilis at 1.5 per 100,000 (1 case, too few for a reliable comparison). Confidential STD testing is available throughout Belknap County — knowing your status is the only way to catch infections that often show no symptoms.
STD Trends in Belknap 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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Belknap County vs New Hampshire and the US
| Infection | Belknap County | New Hampshire | US | vs New Hampshire | vs US | Rank in New Hampshire |
|---|---|---|---|---|---|---|
| Chlamydia | 130.785 cases | 196.6 | 490.7 | 33.5% below | 73.4% below | 8th of 10 |
| Gonorrhea | 2013 cases | 41.9 | 178.2 | Too few cases | Too few cases | – |
| Syphilis (P&S) | 1.51 case | 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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