STD Rates in Siskiyou County, California

2023 CDC surveillance data for Siskiyou County, California — chlamydia, gonorrhea, and syphilis rates with state comparisons.

Data Year: 2023 Source: CDC STI Surveillance Population: 42,899
Combined
303
per 100K
45th / 58
Chlamydia
240.1
per 100K • 103 cases
US rate: 490.7
46th of 58 in California
Higher than 40% of US counties
Gonorrhea
46.6
per 100K • 20 cases
US rate: 178.2
48th of 58 in California
Higher than 38% of US counties
Syphilis P&S
16.3
per 100K • 7 cases
Based on 7 cases — interpret with care
US rate: 15.8

Siskiyou County is among the lower-burden counties in California, reporting a combined STD rate of 303.0 per 100,000 residents in 2023 — 45th of 58 counties. Reported infections included chlamydia at 240.1 per 100,000 (103 cases, 51% below the state rate), gonorrhea at 46.6 per 100,000 (20 cases, 75% below the state rate), syphilis at 16.3 per 100,000 (7 cases, too few for a reliable comparison). Confidential STD testing is available throughout Siskiyou County — knowing your status is the only way to catch infections that often show no symptoms.

STD Trends in Siskiyou 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.

Chlamydia
240.1
per 100K in 2023
0.0 in 2000
Peak 306.3 in 2020
Gonorrhea
46.6
per 100K in 2023
0.0 in 2000
Peak 172.4 in 2020
Syphilis (P&S)
16.3
per 100K in 2023
0.0 in 2000
Peak 89.3 in 2022

Source: CDC NCHHSTP AtlasPlus county surveillance, 2000–2023.

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Siskiyou County vs California and the US

Infection Siskiyou County California US vs California vs US Rank in California
Chlamydia 240.1103 cases 491.1 490.7 51.1% below 51.1% below 46th of 58
Gonorrhea 46.620 cases 190.2 178.2 75.5% below 73.8% below 48th of 58
Syphilis (P&S) 16.37 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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FAQs

Siskiyou County ranks 45th of 58 California counties for combined STD rate in 2023, at 303.0 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Siskiyou County, with 103 cases at a rate of 240.1 per 100,000 residents.
STDTest.com lists confidential testing locations across Siskiyou County and California. Many offer same-day appointments with results in 1–3 days.
Data sourced from the CDC's annual STI Surveillance Report. Rates are per 100,000 population and reflect reported cases only — actual prevalence is likely higher due to undiagnosed infections. While we strive for accuracy, STDTest.com makes no representations or warranties regarding the completeness or accuracy of this data and is not responsible for any errors or omissions. This page is for informational purposes only and does not constitute medical advice.