STD Rates in Los Angeles County, California
2023 CDC surveillance data for Los Angeles County, California — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Los Angeles County has one of the higher STD burdens in California, with a combined rate of 915.7 per 100,000 residents in 2023 — ranking 3rd of 58 counties. Reported infections included chlamydia at 602.3 per 100,000 (58,200 cases, 23% above the state rate), gonorrhea at 291.8 per 100,000 (28,195 cases, 53% above the state rate), syphilis at 21.6 per 100,000 (2,085 cases, 33% above the state rate). Confidential STD testing is available throughout Los Angeles County — knowing your status is the only way to catch infections that often show no symptoms.
STD Trends in Los Angeles 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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Los Angeles County vs California and the US
| Infection | Los Angeles County | California | US | vs California | vs US | Rank in California |
|---|---|---|---|---|---|---|
| Chlamydia | 602.358,200 cases | 491.1 | 490.7 | 22.6% above | 22.7% above | 6th of 58 |
| Gonorrhea | 291.828,195 cases | 190.2 | 178.2 | 53.4% above | 63.7% above | 2nd of 58 |
| Syphilis (P&S) | 21.62,085 cases | 16.3 | 15.8 | 32.5% above | 36.7% above | 10th 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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