STD Rates in Alexander County, Illinois
2023 CDC surveillance data for Alexander County, Illinois — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Alexander County has one of the higher STD burdens in Illinois, with a combined rate of 1,278.0 per 100,000 residents in 2023 — ranking 3rd of 102 counties. Reported infections included chlamydia at 766.8 per 100,000 (36 cases, 37% above the state rate), gonorrhea at 511.2 per 100,000 (24 cases, 153% above the state rate). No syphilis cases were reported in Alexander County in 2023. Confidential STD testing is available throughout Alexander County — knowing your status is the only way to catch infections that often show no symptoms.
STD Trends in Alexander 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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Alexander County vs Illinois and the US
| Infection | Alexander County | Illinois | US | vs Illinois | vs US | Rank in Illinois |
|---|---|---|---|---|---|---|
| Chlamydia | 766.836 cases | 557.7 | 490.7 | 37.5% above | 56.3% above | 7th of 102 |
| Gonorrhea | 511.224 cases | 202.3 | 178.2 | 152.7% above | 186.9% above | 1st of 102 |
| Syphilis (P&S) | 00 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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