STD Rates in Napa County, California
2023 CDC surveillance data for Napa County, California — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Napa County recorded a combined STD rate of 365.6 per 100,000 residents in 2023, ranking 42nd of 58 counties in California. Reported infections included chlamydia at 256.7 per 100,000 (342 cases, 48% below the state rate), gonorrhea at 91.6 per 100,000 (122 cases, 52% below the state rate), syphilis at 17.3 per 100,000 (23 cases, 6% above the state rate). Confidential STD testing is available throughout Napa County — knowing your status is the only way to catch infections that often show no symptoms.
STD Trends in Napa 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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Napa County vs California and the US
| Infection | Napa County | California | US | vs California | vs US | Rank in California |
|---|---|---|---|---|---|---|
| Chlamydia | 256.7342 cases | 491.1 | 490.7 | 47.7% below | 47.7% below | 43rd of 58 |
| Gonorrhea | 91.6122 cases | 190.2 | 178.2 | 51.8% below | 48.6% below | 30th of 58 |
| Syphilis (P&S) | 17.323 cases | 16.3 | 15.8 | 6.1% above | 9.5% above | 18th 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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