STD Rates in Johnson County, Indiana

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

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Data Year: 2023 Source: CDC STI Surveillance Population: 167,805
Combined
372.5
per 100K
32nd / 92
Chlamydia
307.5
per 100K • 516 cases
Gonorrhea
60.2
per 100K • 101 cases
Syphilis P&S
4.8
per 100K • 8 cases

Johnson County reported a combined STD rate of 372.5 per 100,000 residents in 2023, placing it 32nd of 92 Indiana counties — in the upper half of the state. Reported infections included chlamydia at 307.5 per 100,000 (516 cases, 37% below the state rate), gonorrhea at 60.2 per 100,000 (101 cases, 58% below the state rate), syphilis at 4.8 per 100,000 (8 cases, 45% below the state rate). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Johnson County has confidential testing locations available.

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Johnson County vs Indiana Average

Infection Johnson County Indiana Rate Difference
Chlamydia 307.5 491 37% below
Gonorrhea 60.2 144 58% below
Syphilis (P&S) 4.8 8.7 45% below

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Largest cities in Johnson County, Indiana

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

STD testing in Greenwood, IN66,029 people → STD testing in Franklin, IN26,168 people → STD testing in Bargersville, IN10,752 people →

Largest Counties in Indiana

Marion County → Lake County → Allen County → Hamilton County → St. Joseph County → Elkhart County → Tippecanoe County → Hendricks County → Vanderburgh County → Porter County →

All 92 Indiana counties → STD testing in Indiana →

FAQs

Johnson County ranks 32nd of 92 Indiana counties for combined STD rate in 2023, at 372.5 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Johnson County, with 516 cases at a rate of 307.5 per 100,000 residents.
STDTest.com lists confidential testing locations across Johnson County and Indiana. 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