STD Rates in Massac County, Illinois
2023 CDC surveillance data for Massac County, Illinois — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Massac County reported a combined STD rate of 439.2 per 100,000 residents in 2023, placing it 30th of 102 Illinois counties — in the upper half of the state. Reported infections included chlamydia at 285.5 per 100,000 (39 cases, 49% below the state rate), gonorrhea at 153.7 per 100,000 (21 cases, 24% below the state rate). No syphilis cases were reported in Massac County in 2023. Confidential STD testing is available throughout Massac County — knowing your status is the only way to catch infections that often show no symptoms.
STD Trends in Massac 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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Massac County vs Illinois and the US
| Infection | Massac County | Illinois | US | vs Illinois | vs US | Rank in Illinois |
|---|---|---|---|---|---|---|
| Chlamydia | 285.539 cases | 557.7 | 490.7 | 48.8% below | 41.8% below | 40th of 102 |
| Gonorrhea | 153.721 cases | 202.3 | 178.2 | 24% below | 13.7% below | 20th 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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