STD Rates in Henry County, Illinois

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

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Data Year: 2023 Source: CDC STI Surveillance Population: 48,456
Combined
222.9
per 100K
81st / 102
Chlamydia
187.8
per 100K • 91 cases
Gonorrhea
33
per 100K • 16 cases
Syphilis P&S
2.1
per 100K • 1 cases

Henry County is among the lower-burden counties in Illinois, reporting a combined STD rate of 222.9 per 100,000 residents in 2023 — 81st of 102 counties. Reported infections included chlamydia at 187.8 per 100,000 (91 cases, 66% below the state rate), gonorrhea at 33.0 per 100,000 (16 cases, 84% below the state rate), syphilis at 2.1 per 100,000 (1 case, 82% below the state rate). Confidential STD testing is available throughout Henry County — knowing your status is the only way to catch infections that often show no symptoms.

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Henry County vs Illinois Average

Infection Henry County Illinois Rate Difference
Chlamydia 187.8 557.7 66% below
Gonorrhea 33 202.3 84% below
Syphilis (P&S) 2.1 11.6 82% below

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Largest cities in Henry County, Illinois

Largest first, by Census population. Each city page lists nearby clinics, free and low-cost testing, and labs.

STD testing in Kewanee, IL11,913 people → STD testing in Colona, IL5,139 people →

Largest Counties in Illinois

Cook County → Dupage County → Lake County → Will County → Kane County → Mchenry County → Winnebago County → Madison County → St. Clair County → Champaign County →

All 102 Illinois counties → STD testing in Illinois →

FAQs

Henry County ranks 81st of 102 Illinois counties for combined STD rate in 2023, at 222.9 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Henry County, with 91 cases at a rate of 187.8 per 100,000 residents.
STDTest.com lists confidential testing locations across Henry County and Illinois. Many offer same-day appointments with results in 1–3 days.

Related Resources

STD Testing Window Periods How Soon After Sex to Test STD Symptoms Guide Testing Timeline Chart All Testing Clinics STD Statistics and Data
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