STD Rates in Merrimack County, New Hampshire

2023 CDC surveillance data for Merrimack County, New Hampshire — chlamydia, gonorrhea, and syphilis rates with state comparisons.

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Data Year: 2023 Source: CDC STI Surveillance Population: 157,135
Combined
218.9
per 100K
3rd / 10
Chlamydia
180.1
per 100K • 283 cases
Gonorrhea
33.1
per 100K • 52 cases
Syphilis P&S
5.7
per 100K • 9 cases

Merrimack County reported a combined STD rate of 218.9 per 100,000 residents in 2023, placing it 3rd of 10 New Hampshire counties — in the upper half of the state. Reported infections included chlamydia at 180.1 per 100,000 (283 cases, 8% below the state rate), gonorrhea at 33.1 per 100,000 (52 cases, 21% below the state rate), syphilis at 5.7 per 100,000 (9 cases, 46% above the state rate). Confidential STD testing is available throughout Merrimack County — knowing your status is the only way to catch infections that often show no symptoms.

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Merrimack County County vs New Hampshire Average

Infection Merrimack County County New Hampshire Rate Difference
Chlamydia 180.1 196.6 8% below
Gonorrhea 33.1 41.9 21% below
Syphilis (P&S) 5.7 3.9 46% above

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Other Counties in New Hampshire

STD Testing Locations in Merrimack County, New Hampshire

FAQs

Merrimack County ranks 3rd of 10 New Hampshire counties for combined STD rate in 2023, at 218.9 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Merrimack County, with 283 cases at a rate of 180.1 per 100,000 residents.
STDTest.com lists confidential testing locations across Merrimack County and New Hampshire. Many offer same-day appointments with results in 1u20133 days.

Related Resources

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Data sourced from the CDC's annual STI Surveillance Report. Rates are per 100,000 population and reflect reported cases only — actual prevalence is likely higher due to undiagnosed infections. While we strive for accuracy, STDTest.com makes no representations or warranties regarding the completeness or accuracy of this data and is not responsible for any errors or omissions. This page is for informational purposes only and does not constitute medical advice.
Sources