STD Rates in Chittenden County, Vermont

2023 CDC surveillance data for Chittenden County, Vermont — chlamydia, gonorrhea, and syphilis rates with state comparisons.

Data Year: 2023 Source: CDC STI Surveillance Population: 169,510
Combined
343.4
per 100K
2nd / 14
Chlamydia
275.5
per 100K • 467 cases
US rate: 490.7
2nd of 14 in Vermont
Higher than 48% of US counties
Gonorrhea
67.3
per 100K • 114 cases
US rate: 178.2
1st of 14 in Vermont
Higher than 51% of US counties
Syphilis P&S
0.6
per 100K • 1 cases
Based on 1 case — interpret with care
US rate: 15.8

Chittenden County has one of the higher STD burdens in Vermont, with a combined rate of 343.4 per 100,000 residents in 2023 — ranking 2nd of 14 counties. Reported infections included chlamydia at 275.5 per 100,000 (467 cases, 36% above the state rate), gonorrhea at 67.3 per 100,000 (114 cases, 98% above the state rate), syphilis at 0.6 per 100,000 (1 case, too few for a reliable comparison). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Chittenden County has confidential testing locations available.

STD Trends in Chittenden County, 2000–2023

Reported cases per 100,000 residents each year, against the Vermont 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
275.5
per 100K in 2023
133.2 in 2000
Peak 451.4 in 2014
Gonorrhea
67.3
per 100K in 2023
27.9 in 2000
Peak 67.3 in 2023
Syphilis (P&S)
0.6
per 100K in 2023
0.0 in 2000
Peak 4.3 in 2016

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

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Chittenden County vs Vermont and the US

Infection Chittenden County Vermont US vs Vermont vs US Rank in Vermont
Chlamydia 275.5467 cases 201.9 490.7 36.5% above 43.9% below 2nd of 14
Gonorrhea 67.3114 cases 34 178.2 97.9% above 62.2% below 1st of 14
Syphilis (P&S) 0.61 case 0.5 15.8 Too few cases Too few cases

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

Chittenden County ranks 2nd of 14 Vermont counties for combined STD rate in 2023, at 343.4 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Chittenden County, with 467 cases at a rate of 275.5 per 100,000 residents.
STDTest.com lists confidential testing locations across Chittenden County and Vermont. 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.