STD Rates in St. Mary's County, Maryland
2023 CDC surveillance data for St. Mary's County, Maryland — chlamydia, gonorrhea, and syphilis rates with state comparisons.
St. Mary's County is among the lower-burden counties in Maryland, reporting a combined STD rate of 334.9 per 100,000 residents in 2023 — 19th of 24 counties. Reported infections included chlamydia at 253.3 per 100,000 (292 cases, 56% below the state rate), gonorrhea at 80.7 per 100,000 (93 cases, 61% below the state rate), syphilis at 0.9 per 100,000 (1 case, too few for a reliable comparison). Many STDs show no symptoms, so testing is the only reliable way to know your status. Confidential options are available across St. Mary's County.
STD Trends in St. Mary's County, 2000–2023
Reported cases per 100,000 residents each year, against the Maryland 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. Mary's County vs Maryland and the US
| Infection | St. Mary's County | Maryland | US | vs Maryland | vs US | Rank in Maryland |
|---|---|---|---|---|---|---|
| Chlamydia | 253.3292 cases | 579.8 | 490.7 | 56.3% below | 48.4% below | 20th of 24 |
| Gonorrhea | 80.793 cases | 207.1 | 178.2 | 61% below | 54.7% below | 17th of 24 |
| Syphilis (P&S) | 0.91 case | 14.2 | 15.8 | Too few cases | Too few cases | – |
Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among Maryland’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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