STD Rates in Grundy County, Illinois

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

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Data Year: 2023 Source: CDC STI Surveillance Population: 53,571
Combined
201.6
per 100K
85th / 102
Chlamydia
179.2
per 100K • 96 cases
Gonorrhea
22.4
per 100K • 12 cases
Syphilis P&S
0.0
No cases reported

Grundy County is among the lower-burden counties in Illinois, reporting a combined STD rate of 201.6 per 100,000 residents in 2023 — 85th of 102 counties. Reported infections included chlamydia at 179.2 per 100,000 (96 cases, 68% below the state rate), gonorrhea at 22.4 per 100,000 (12 cases, 89% below the state rate). No syphilis cases were reported in Grundy County in 2023. Many STDs show no symptoms, so testing is the only reliable way to know your status. Confidential options are available across Grundy County.

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Grundy County vs Illinois Average

Infection Grundy County Illinois Rate Difference
Chlamydia 179.2 557.7 68% below
Gonorrhea 22.4 202.3 89% below

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Largest cities in Grundy County, Illinois

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

STD testing in Morris, IL14,898 people → STD testing in Minooka, IL12,891 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

Grundy County ranks 85th of 102 Illinois counties for combined STD rate in 2023, at 201.6 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Grundy County, with 96 cases at a rate of 179.2 per 100,000 residents.
STDTest.com lists confidential testing locations across Grundy 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