STD Rates in Monroe County, Illinois

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

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Data Year: 2023 Source: CDC STI Surveillance Population: 34,965
Combined
168.8
per 100K
94th / 102
Chlamydia
114.4
per 100K • 40 cases
Gonorrhea
54.4
per 100K • 19 cases
Syphilis P&S
0.0
No cases reported

Monroe County is among the lower-burden counties in Illinois, reporting a combined STD rate of 168.8 per 100,000 residents in 2023 — 94th of 102 counties. Reported infections included chlamydia at 114.4 per 100,000 (40 cases, 79% below the state rate), gonorrhea at 54.4 per 100,000 (19 cases, 73% below the state rate). No syphilis cases were reported in Monroe County in 2023. Many STDs show no symptoms, so testing is the only reliable way to know your status. Confidential options are available across Monroe County.

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Monroe County vs Illinois Average

Infection Monroe County Illinois Rate Difference
Chlamydia 114.4 557.7 79% below
Gonorrhea 54.4 202.3 73% below

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Largest cities in Monroe County, Illinois

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

STD testing in Waterloo, IL11,129 people → STD testing in Columbia, IL11,127 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

Monroe County ranks 94th of 102 Illinois counties for combined STD rate in 2023, at 168.8 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Monroe County, with 40 cases at a rate of 114.4 per 100,000 residents.
STDTest.com lists confidential testing locations across Monroe 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