STD Rates in Knox County, Illinois
2023 CDC surveillance data for Knox County, Illinois — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Knox County reported a combined STD rate of 419.3 per 100,000 residents in 2023, placing it 35th of 102 Illinois counties — in the upper half of the state. Reported infections included chlamydia at 332.6 per 100,000 (161 cases, 40% below the state rate), gonorrhea at 82.6 per 100,000 (40 cases, 59% below the state rate), syphilis at 4.1 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. Knox County has confidential testing locations available.
STD Trends in Knox County, 2000–2023
Reported cases per 100,000 residents each year, against the Illinois 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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Knox County vs Illinois and the US
| Infection | Knox County | Illinois | US | vs Illinois | vs US | Rank in Illinois |
|---|---|---|---|---|---|---|
| Chlamydia | 332.6161 cases | 557.7 | 490.7 | 40.4% below | 32.2% below | 31st of 102 |
| Gonorrhea | 82.640 cases | 202.3 | 178.2 | 59.2% below | 53.6% below | 43rd of 102 |
| Syphilis (P&S) | 4.12 cases | 11.6 | 15.8 | Too few cases | Too few cases | – |
Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among Illinois’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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