STD Rates in St. Charles County, Missouri
2023 CDC surveillance data for St. Charles County, Missouri — chlamydia, gonorrhea, and syphilis rates with state comparisons.
St. Charles County reported a combined STD rate of 337.9 per 100,000 residents in 2023, placing it 45th of 115 Missouri counties — in the upper half of the state. Reported infections included chlamydia at 265.2 per 100,000 (1,105 cases, 47% below the state rate), gonorrhea at 67.4 per 100,000 (281 cases, 67% below the state rate), syphilis at 5.3 per 100,000 (22 cases, 75% below the state rate). Confidential STD testing is available throughout St. Charles County — knowing your status is the only way to catch infections that often show no symptoms.
STD Trends in St. Charles County, 2000–2023
Reported cases per 100,000 residents each year, against the Missouri 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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St. Charles County vs Missouri and the US
| Infection | St. Charles County | Missouri | US | vs Missouri | vs US | Rank in Missouri |
|---|---|---|---|---|---|---|
| Chlamydia | 265.21,105 cases | 498.6 | 490.7 | 46.8% below | 46% below | 47th of 115 |
| Gonorrhea | 67.4281 cases | 201.9 | 178.2 | 66.6% below | 62.2% below | 44th of 115 |
| Syphilis (P&S) | 5.322 cases | 21.5 | 15.8 | 75.3% below | 66.5% below | 72nd of 115 |
Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among Missouri’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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