STD Rates in Mendocino County, California
2023 CDC surveillance data for Mendocino County, California — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Mendocino County recorded a combined STD rate of 404.0 per 100,000 residents in 2023, ranking 36th of 58 counties in California. Reported infections included chlamydia at 306.4 per 100,000 (273 cases, 38% below the state rate), gonorrhea at 67.3 per 100,000 (60 cases, 65% below the state rate), syphilis at 30.3 per 100,000 (27 cases, 86% above the state rate). Confidential STD testing is available throughout Mendocino County — knowing your status is the only way to catch infections that often show no symptoms.
STD Trends in Mendocino County, 2000–2023
Reported cases per 100,000 residents each year, against the California 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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Mendocino County vs California and the US
| Infection | Mendocino County | California | US | vs California | vs US | Rank in California |
|---|---|---|---|---|---|---|
| Chlamydia | 306.4273 cases | 491.1 | 490.7 | 37.6% below | 37.6% below | 35th of 58 |
| Gonorrhea | 67.360 cases | 190.2 | 178.2 | 64.6% below | 62.2% below | 40th of 58 |
| Syphilis (P&S) | 30.327 cases | 16.3 | 15.8 | 85.9% above | 91.8% above | 5th of 58 |
Rates per 100,000 residents, 2023. Ranks run from the highest rate (1st) among California’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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