STD Rates in Sangamon County, Illinois
2023 CDC surveillance data for Sangamon County, Illinois — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Sangamon County has one of the higher STD burdens in Illinois, with a combined rate of 911.1 per 100,000 residents in 2023 — ranking 10th of 102 counties. Reported infections included chlamydia at 590.7 per 100,000 (1,143 cases, 6% above the state rate), gonorrhea at 304.4 per 100,000 (589 cases, 50% above the state rate), syphilis at 16.0 per 100,000 (31 cases, 38% above the state rate). Many STDs show no symptoms, so testing is the only reliable way to know your status. Confidential options are available across Sangamon County.
STD Trends in Sangamon 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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Sangamon County vs Illinois and the US
| Infection | Sangamon County | Illinois | US | vs Illinois | vs US | Rank in Illinois |
|---|---|---|---|---|---|---|
| Chlamydia | 590.71,143 cases | 557.7 | 490.7 | 5.9% above | 20.4% above | 12th of 102 |
| Gonorrhea | 304.4589 cases | 202.3 | 178.2 | 50.5% above | 70.8% above | 8th of 102 |
| Syphilis (P&S) | 1631 cases | 11.6 | 15.8 | 37.9% above | 1.3% above | 18th 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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