STD Rates in Mason County, Washington
2023 CDC surveillance data for Mason County, Washington — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Mason County recorded a combined STD rate of 400.6 per 100,000 residents in 2023, ranking 20th of 39 counties in Washington. Reported infections included chlamydia at 315.8 per 100,000 (216 cases, 11% below the state rate), gonorrhea at 65.8 per 100,000 (45 cases, 49% below the state rate), syphilis at 19.0 per 100,000 (13 cases, too few for a reliable comparison). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Mason County has confidential testing locations available.
STD Trends in Mason County, 2000–2023
Reported cases per 100,000 residents each year, against the Washington 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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Mason County vs Washington and the US
| Infection | Mason County | Washington | US | vs Washington | vs US | Rank in Washington |
|---|---|---|---|---|---|---|
| Chlamydia | 315.8216 cases | 354.4 | 490.7 | 10.9% below | 35.6% below | 19th of 39 |
| Gonorrhea | 65.845 cases | 129.6 | 178.2 | 49.2% below | 63.1% below | 18th of 39 |
| Syphilis (P&S) | 1913 cases | 21.3 | 15.8 | Too few cases | Too few cases | – |
Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among Washington’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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