STD Rates in Nassau County, New York

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

Data Year: 2023 Source: CDC STI Surveillance Population: 1,381,663
Combined
406.1
per 100K
25th / 62
Chlamydia
328.3
per 100K • 4,536 cases
US rate: 490.7
22nd of 62 in New York
Higher than 58% of US counties
Gonorrhea
70.1
per 100K • 968 cases
US rate: 178.2
31st of 62 in New York
Higher than 53% of US counties
Syphilis P&S
7.7
per 100K • 107 cases
US rate: 15.8
26th of 62 in New York
Higher than 53% of US counties

Nassau County reported a combined STD rate of 406.1 per 100,000 residents in 2023, placing it 25th of 62 New York counties — in the upper half of the state. Reported infections included chlamydia at 328.3 per 100,000 (4,536 cases, 41% below the state rate), gonorrhea at 70.1 per 100,000 (968 cases, 70% below the state rate), syphilis at 7.7 per 100,000 (107 cases, 48% 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 Nassau County.

STD Trends in Nassau County, 2000–2023

Reported cases per 100,000 residents each year, against the New York 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.

Chlamydia
328.3
per 100K in 2023
0.0 in 2000
Peak 365.5 in 2019
Gonorrhea
70.1
per 100K in 2023
0.0 in 2000
Peak 70.7 in 2021
Syphilis (P&S)
7.7
per 100K in 2023
0.0 in 2000
Peak 9.4 in 2022

Source: CDC NCHHSTP AtlasPlus county surveillance, 2000–2023.

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Nassau County vs New York and the US

Infection Nassau County New York US vs New York vs US Rank in New York
Chlamydia 328.34,536 cases 558.4 490.7 41.2% below 33.1% below 22nd of 62
Gonorrhea 70.1968 cases 235.6 178.2 70.2% below 60.7% below 31st of 62
Syphilis (P&S) 7.7107 cases 14.8 15.8 48% below 51.3% below 26th of 62

Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among New York’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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FAQs

Nassau County ranks 25th of 62 New York counties for combined STD rate in 2023, at 406.1 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Nassau County, with 4,536 cases at a rate of 328.3 per 100,000 residents.
STDTest.com lists confidential testing locations across Nassau County and New York. Many offer same-day appointments with results in 1–3 days.
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.