STD Rates in Colusa County, California
2023 CDC surveillance data for Colusa County, California — chlamydia, gonorrhea, and syphilis rates with state comparisons.
Colusa County is among the lower-burden counties in California, reporting a combined STD rate of 317.7 per 100,000 residents in 2023 — 44th of 58 counties. Reported infections included chlamydia at 249.6 per 100,000 (55 cases, 49% below the state rate), gonorrhea at 49.9 per 100,000 (11 cases, too few for a reliable comparison), syphilis at 18.2 per 100,000 (4 cases, too few for a reliable comparison). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Colusa County has confidential testing locations available.
STD Trends in Colusa 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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Colusa County vs California and the US
| Infection | Colusa County | California | US | vs California | vs US | Rank in California |
|---|---|---|---|---|---|---|
| Chlamydia | 249.655 cases | 491.1 | 490.7 | 49.2% below | 49.1% below | 44th of 58 |
| Gonorrhea | 49.911 cases | 190.2 | 178.2 | Too few cases | Too few cases | – |
| Syphilis (P&S) | 18.24 cases | 16.3 | 15.8 | Too few cases | Too few cases | – |
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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