STD Rates in Coles County, Illinois

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

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Data Year: 2023 Source: CDC STI Surveillance Population: 46,061
Combined
875
per 100K
11th / 102
Chlamydia
629.6
per 100K • 290 cases
Gonorrhea
243.2
per 100K • 112 cases
Syphilis P&S
2.2
per 100K • 1 cases

Coles County has one of the higher STD burdens in Illinois, with a combined rate of 875.0 per 100,000 residents in 2023 — ranking 11th of 102 counties. Reported infections included chlamydia at 629.6 per 100,000 (290 cases, 13% above the state rate), gonorrhea at 243.2 per 100,000 (112 cases, 20% above the state rate), syphilis at 2.2 per 100,000 (1 case, 81% below the state rate). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Coles County has confidential testing locations available.

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Coles County vs Illinois Average

Infection Coles County Illinois Rate Difference
Chlamydia 629.6 557.7 13% above
Gonorrhea 243.2 202.3 20% above
Syphilis (P&S) 2.2 11.6 81% below

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Largest cities in Coles County, Illinois

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

STD testing in Charleston, IL17,062 people → STD testing in Mattoon, IL16,586 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

Coles County ranks 11th of 102 Illinois counties for combined STD rate in 2023, at 875.0 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Coles County, with 290 cases at a rate of 629.6 per 100,000 residents.
STDTest.com lists confidential testing locations across Coles 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