STD Rates in Franklin County, Illinois
2023 CDC surveillance data for Franklin County, Illinois — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Franklin County reported a combined STD rate of 438.9 per 100,000 residents in 2023, placing it 31st of 102 Illinois counties — in the upper half of the state. Reported infections included chlamydia at 309.7 per 100,000 (115 cases, 44% below the state rate), gonorrhea at 110.4 per 100,000 (41 cases, 45% below the state rate), syphilis at 18.8 per 100,000 (7 cases, 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 Franklin County.
STD Trends in Franklin 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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Franklin County vs Illinois and the US
| Infection | Franklin County | Illinois | US | vs Illinois | vs US | Rank in Illinois |
|---|---|---|---|---|---|---|
| Chlamydia | 309.7115 cases | 557.7 | 490.7 | 44.5% below | 36.9% below | 35th of 102 |
| Gonorrhea | 110.441 cases | 202.3 | 178.2 | 45.4% below | 38% below | 27th of 102 |
| Syphilis (P&S) | 18.87 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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