STD Rates in Rock Island County, Illinois

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

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Data Year: 2023 Source: CDC STI Surveillance Population: 141,224
Combined
747.8
per 100K
14th / 102
Chlamydia
542.4
per 100K • 766 cases
Gonorrhea
191.9
per 100K • 271 cases
Syphilis P&S
13.5
per 100K • 19 cases

Rock Island County has one of the higher STD burdens in Illinois, with a combined rate of 747.8 per 100,000 residents in 2023 — ranking 14th of 102 counties. Reported infections included chlamydia at 542.4 per 100,000 (766 cases, 3% below the state rate), gonorrhea at 191.9 per 100,000 (271 cases, 5% below the state rate), syphilis at 13.5 per 100,000 (19 cases, 16% above the state rate). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Rock Island County has confidential testing locations available.

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Rock Island County vs Illinois Average

Infection Rock Island County Illinois Rate Difference
Chlamydia 542.4 557.7 3% below
Gonorrhea 191.9 202.3 5% below
Syphilis (P&S) 13.5 11.6 16% above

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Largest cities in Rock Island County, Illinois

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

STD testing in Moline, IL42,197 people → STD testing in Rock Island, IL36,151 people → STD testing in East Moline, IL20,904 people → STD testing in Silvis, IL7,955 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

Rock Island County ranks 14th of 102 Illinois counties for combined STD rate in 2023, at 747.8 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Rock Island County, with 766 cases at a rate of 542.4 per 100,000 residents.
STDTest.com lists confidential testing locations across Rock Island 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