STD Rates in Yellowstone County, Montana

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

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Data Year: 2023 Source: CDC STI Surveillance Population: 170,842
Combined
520.3
per 100K
6th / 51
Chlamydia
375.2
per 100K • 641 cases
Gonorrhea
87.2
per 100K • 149 cases
Syphilis P&S
57.9
per 100K • 99 cases

Yellowstone County has one of the higher STD burdens in Montana, with a combined rate of 520.3 per 100,000 residents in 2023 — ranking 6th of 51 counties. Reported infections included chlamydia at 375.2 per 100,000 (641 cases, 16% above the state rate), gonorrhea at 87.2 per 100,000 (149 cases, 29% above the state rate), syphilis at 57.9 per 100,000 (99 cases, 111% above the state rate). Confidential STD testing is available throughout Yellowstone County — knowing your status is the only way to catch infections that often show no symptoms.

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Yellowstone County County vs Montana Average

Infection Yellowstone County County Montana Rate Difference
Chlamydia 375.2 322.6 16% above
Gonorrhea 87.2 67.7 29% above
Syphilis (P&S) 57.9 27.5 111% above

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Other Counties in Montana

STD Testing Locations in Yellowstone County, Montana

FAQs

Yellowstone County ranks 6th of 51 Montana counties for combined STD rate in 2023, at 520.3 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Yellowstone County, with 641 cases at a rate of 375.2 per 100,000 residents.
STDTest.com lists confidential testing locations across Yellowstone County and Montana. Many offer same-day appointments with results in 1u20133 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