STD Rates in Santa Clara County, California
2023 CDC surveillance data for Santa Clara County, California — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Santa Clara County recorded a combined STD rate of 421.1 per 100,000 residents in 2023, ranking 31st of 58 counties in California. Reported infections included chlamydia at 301.8 per 100,000 (5,666 cases, 39% below the state rate), gonorrhea at 110.9 per 100,000 (2,083 cases, 42% below the state rate), syphilis at 8.4 per 100,000 (157 cases, 48% below the state rate). Many STDs show no symptoms, so testing is the only reliable way to know your status. Confidential options are available across Santa Clara County.
STD Trends in Santa Clara 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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Santa Clara County vs California and the US
| Infection | Santa Clara County | California | US | vs California | vs US | Rank in California |
|---|---|---|---|---|---|---|
| Chlamydia | 301.85,666 cases | 491.1 | 490.7 | 38.5% below | 38.5% below | 36th of 58 |
| Gonorrhea | 110.92,083 cases | 190.2 | 178.2 | 41.7% below | 37.8% below | 21st of 58 |
| Syphilis (P&S) | 8.4157 cases | 16.3 | 15.8 | 48.5% below | 46.8% below | 43rd 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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