STD Rates in St. Johns County, Florida

2023 CDC surveillance data for St. Johns County, Florida — chlamydia, gonorrhea, and syphilis rates with state comparisons.

Data Year: 2023 Source: CDC STI Surveillance Population: 320,110
Combined
240.2
per 100K
64th / 67
Chlamydia
181.5
per 100K • 581 cases
US rate: 490.7
64th of 67 in Florida
Higher than 24% of US counties
Gonorrhea
53.4
per 100K • 171 cases
US rate: 178.2
63rd of 67 in Florida
Higher than 43% of US counties
Syphilis P&S
5.3
per 100K • 17 cases
Based on 17 cases — interpret with care
US rate: 15.8

St. Johns County is among the lower-burden counties in Florida, reporting a combined STD rate of 240.2 per 100,000 residents in 2023 — 64th of 67 counties. Reported infections included chlamydia at 181.5 per 100,000 (581 cases, 64% below the state rate), gonorrhea at 53.4 per 100,000 (171 cases, 74% below the state rate), syphilis at 5.3 per 100,000 (17 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 St. Johns County.

STD Trends in St. Johns County, 2000–2023

Reported cases per 100,000 residents each year, against the Florida 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
181.5
per 100K in 2023
45.8 in 2000
Peak 286.4 in 2017
Gonorrhea
53.4
per 100K in 2023
35.3 in 2000
Peak 71.6 in 2015
Syphilis (P&S)
5.3
per 100K in 2023
0.0 in 2000
Peak 6.2 in 2022

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

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St. Johns County vs Florida and the US

Infection St. Johns County Florida US vs Florida vs US Rank in Florida
Chlamydia 181.5581 cases 498.9 490.7 63.6% below 63% below 64th of 67
Gonorrhea 53.4171 cases 206.7 178.2 74.2% below 70% below 63rd of 67
Syphilis (P&S) 5.317 cases 19.3 15.8 Too few cases Too few cases

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

St. Johns County ranks 64th of 67 Florida counties for combined STD rate in 2023, at 240.2 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in St. Johns County, with 581 cases at a rate of 181.5 per 100,000 residents.
STDTest.com lists confidential testing locations across St. Johns County and Florida. 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.