STD Rates in Lake County, Indiana

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

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Data Year: 2023 Source: CDC STI Surveillance Population: 500,617
Combined
738.9
per 100K
6th / 92
Chlamydia
567.7
per 100K • 2,842 cases
Gonorrhea
163.4
per 100K • 818 cases
Syphilis P&S
7.8
per 100K • 39 cases

Lake County has one of the higher STD burdens in Indiana, with a combined rate of 738.9 per 100,000 residents in 2023 — ranking 6th of 92 counties. Reported infections included chlamydia at 567.7 per 100,000 (2,842 cases, 16% above the state rate), gonorrhea at 163.4 per 100,000 (818 cases, 13% above the state rate), syphilis at 7.8 per 100,000 (39 cases, 10% below the state rate). Confidential STD testing is available throughout Lake County — knowing your status is the only way to catch infections that often show no symptoms.

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Lake County vs Indiana Average

Infection Lake County Indiana Rate Difference
Chlamydia 567.7 491 16% above
Gonorrhea 163.4 144 13% above
Syphilis (P&S) 7.8 8.7 10% below

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Largest cities in Lake County, Indiana

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

STD testing in Hammond, IN76,768 people → STD testing in Gary, IN68,113 people → STD testing in Merrillville, IN36,476 people → STD testing in Crown Point, IN34,393 people → STD testing in Schererville, IN29,701 people → STD testing in Hobart, IN29,558 people → STD testing in East Chicago, IN26,022 people → STD testing in Munster, IN23,733 people → STD testing in Highland, IN23,680 people → STD testing in St John, IN22,567 people →
Show all 16 cities ↓Show fewer cities ↑
STD testing in Dyer, IN16,400 people → STD testing in Griffith, IN16,273 people → STD testing in Cedar Lake, IN15,295 people → STD testing in Lake Station, IN13,185 people → STD testing in Lowell, IN11,073 people → STD testing in Winfield, IN7,816 people →

Largest Counties in Indiana

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

All 92 Indiana counties → STD testing in Indiana →

FAQs

Lake County ranks 6th of 92 Indiana counties for combined STD rate in 2023, at 738.9 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Lake County, with 2,842 cases at a rate of 567.7 per 100,000 residents.
STDTest.com lists confidential testing locations across Lake 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