STD Rates in Brown County, South Dakota
2023 CDC surveillance data for Brown County, South Dakota — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Brown County reported a combined STD rate of 368.4 per 100,000 residents in 2023, placing it 29th of 64 South Dakota counties — in the upper half of the state. Reported infections included chlamydia at 326.0 per 100,000 (123 cases, 39% below the state rate), gonorrhea at 37.1 per 100,000 (14 cases, too few for a reliable comparison), syphilis at 5.3 per 100,000 (2 cases, too few for a reliable comparison). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Brown County has confidential testing locations available.
STD Trends in Brown County, 2000–2023
Reported cases per 100,000 residents each year, against the South Dakota 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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Brown County vs South Dakota and the US
| Infection | Brown County | South Dakota | US | vs South Dakota | vs US | Rank in South Dakota |
|---|---|---|---|---|---|---|
| Chlamydia | 326123 cases | 531.6 | 490.7 | 38.7% below | 33.6% below | 26th of 64 |
| Gonorrhea | 37.114 cases | 253.3 | 178.2 | Too few cases | Too few cases | – |
| Syphilis (P&S) | 5.32 cases | 73.4 | 15.8 | Too few cases | Too few cases | – |
Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among South Dakota’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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