STD Rates in Madison County, Illinois
2023 CDC surveillance data for Madison County, Illinois — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Madison County has one of the higher STD burdens in Illinois, with a combined rate of 619.6 per 100,000 residents in 2023 — ranking 18th of 102 counties. Reported infections included chlamydia at 441.9 per 100,000 (1,161 cases, 21% below the state rate), gonorrhea at 160.2 per 100,000 (421 cases, 21% below the state rate), syphilis at 17.5 per 100,000 (46 cases, 51% above the state rate). Confidential STD testing is available throughout Madison County — knowing your status is the only way to catch infections that often show no symptoms.
STD Trends in Madison 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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Madison County vs Illinois and the US
| Infection | Madison County | Illinois | US | vs Illinois | vs US | Rank in Illinois |
|---|---|---|---|---|---|---|
| Chlamydia | 441.91,161 cases | 557.7 | 490.7 | 20.8% below | 9.9% below | 21st of 102 |
| Gonorrhea | 160.2421 cases | 202.3 | 178.2 | 20.8% below | 10.1% below | 19th of 102 |
| Syphilis (P&S) | 17.546 cases | 11.6 | 15.8 | 50.9% above | 10.8% above | 13th of 102 |
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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