STD Rates in Missoula County, Montana
2023 CDC surveillance data for Missoula County, Montana — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Missoula County reported a combined STD rate of 358.6 per 100,000 residents in 2023, placing it 15th of 51 Montana counties — in the upper half of the state. Reported infections included chlamydia at 301.2 per 100,000 (367 cases, 7% below the state rate), gonorrhea at 52.5 per 100,000 (64 cases, 22% below the state rate), syphilis at 4.9 per 100,000 (6 cases, too few for a reliable comparison). Confidential STD testing is available throughout Missoula County — knowing your status is the only way to catch infections that often show no symptoms.
STD Trends in Missoula County, 2000–2023
Reported cases per 100,000 residents each year, against the Montana rate (dashed). In a county this size a handful of cases moves the rate a long way, so read the shape rather than any single year.
Source: CDC NCHHSTP AtlasPlus county surveillance, 2000–2023.
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Missoula County vs Montana and the US
| Infection | Missoula County | Montana | US | vs Montana | vs US | Rank in Montana |
|---|---|---|---|---|---|---|
| Chlamydia | 301.2367 cases | 322.6 | 490.7 | 6.6% below | 38.6% below | 15th of 51 |
| Gonorrhea | 52.564 cases | 67.7 | 178.2 | 22.5% below | 70.5% below | 12th of 51 |
| Syphilis (P&S) | 4.96 cases | 27.5 | 15.8 | Too few cases | Too few cases | – |
Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among Montana’s counties. The US rate is all 50 states combined. Comparisons are left out where fewer than 20 cases were reported, because a rate built on so few cases can swing widely from one year to the next.
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