STD Rates in Flathead County, Montana

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

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Data Year: 2023 Source: CDC STI Surveillance Population: 113,671
Combined
239.3
per 100K
24th / 51
Chlamydia
199.7
per 100K • 227 cases
Gonorrhea
36.1
per 100K • 41 cases
Syphilis P&S
3.5
per 100K • 4 cases

Flathead County reported a combined STD rate of 239.3 per 100,000 residents in 2023, placing it 24th of 51 Montana counties — in the upper half of the state. Reported infections included chlamydia at 199.7 per 100,000 (227 cases, 38% below the state rate), gonorrhea at 36.1 per 100,000 (41 cases, 47% below the state rate), syphilis at 3.5 per 100,000 (4 cases, 87% below the state rate). Confidential STD testing is available throughout Flathead County — knowing your status is the only way to catch infections that often show no symptoms.

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Flathead County vs Montana Average

Infection Flathead County Montana Rate Difference
Chlamydia 199.7 322.6 38% below
Gonorrhea 36.1 67.7 47% below
Syphilis (P&S) 3.5 27.5 87% below

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Largest cities in Flathead County, Montana

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

STD testing in Kalispell, MT28,504 people → STD testing in Whitefish, MT8,749 people →

Largest Counties in Montana

Yellowstone County → Gallatin County → Missoula County → Cascade County → Lewis And Clark County → Ravalli County → Silver Bow County → Lake County → Lincoln County → Park County →

All 51 Montana counties → STD testing in Montana →

FAQs

Flathead County ranks 24th of 51 Montana counties for combined STD rate in 2023, at 239.3 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Flathead County, with 227 cases at a rate of 199.7 per 100,000 residents.
STDTest.com lists confidential testing locations across Flathead County and Montana. 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