STD Rates in Brookings County, South Dakota
2023 CDC surveillance data for Brookings County, South Dakota — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Brookings County recorded a combined STD rate of 336.3 per 100,000 residents in 2023, ranking 33rd of 64 counties in South Dakota. Reported infections included chlamydia at 308.5 per 100,000 (111 cases, 42% below the state rate), gonorrhea at 22.2 per 100,000 (8 cases, too few for a reliable comparison), syphilis at 5.6 per 100,000 (2 cases, too few for a reliable comparison). Confidential STD testing is available throughout Brookings County — knowing your status is the only way to catch infections that often show no symptoms.
STD Trends in Brookings 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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Brookings County vs South Dakota and the US
| Infection | Brookings County | South Dakota | US | vs South Dakota | vs US | Rank in South Dakota |
|---|---|---|---|---|---|---|
| Chlamydia | 308.5111 cases | 531.6 | 490.7 | 42% below | 37.1% below | 27th of 64 |
| Gonorrhea | 22.28 cases | 253.3 | 178.2 | Too few cases | Too few cases | – |
| Syphilis (P&S) | 5.62 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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