STD Rates in St. Joseph County, Indiana

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

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Data Year: 2023 Source: CDC STI Surveillance Population: 272,847
Combined
748.4
per 100K
5th / 92
Chlamydia
606.2
per 100K • 1,654 cases
Gonorrhea
134.5
per 100K • 367 cases
Syphilis P&S
7.7
per 100K • 21 cases

St. Joseph County has one of the higher STD burdens in Indiana, with a combined rate of 748.4 per 100,000 residents in 2023 — ranking 5th of 92 counties. Reported infections included chlamydia at 606.2 per 100,000 (1,654 cases, 23% above the state rate), gonorrhea at 134.5 per 100,000 (367 cases, 7% below the state rate), syphilis at 7.7 per 100,000 (21 cases, 11% below the state rate). Routine testing is the surest way to catch STDs early, since many produce no symptoms. St. Joseph County has confidential testing locations available.

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St. Joseph County vs Indiana Average

Infection St. Joseph County Indiana Rate Difference
Chlamydia 606.2 491 23% above
Gonorrhea 134.5 144 7% below
Syphilis (P&S) 7.7 8.7 11% below

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Largest cities in St. Joseph County, Indiana

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

STD testing in South Bend, IN103,085 people → STD testing in Mishawaka, IN51,021 people → STD testing in Granger, IN30,321 people →

Largest Counties in Indiana

Marion County → Lake County → Allen County → Hamilton County → Elkhart County → Tippecanoe County → Hendricks County → Vanderburgh County → Porter County → Johnson County →

All 92 Indiana counties → STD testing in Indiana →

FAQs

St. Joseph County ranks 5th of 92 Indiana counties for combined STD rate in 2023, at 748.4 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in St. Joseph County, with 1,654 cases at a rate of 606.2 per 100,000 residents.
STDTest.com lists confidential testing locations across St. Joseph 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