STD Rates in Shasta County, California

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

Data Year: 2023 Source: CDC STI Surveillance Population: 180,362
Combined
429.7
per 100K
30th / 58
Chlamydia
287.2
per 100K • 518 cases
US rate: 490.7
40th of 58 in California
Higher than 51% of US counties
Gonorrhea
100.4
per 100K • 181 cases
US rate: 178.2
28th of 58 in California
Higher than 65% of US counties
Syphilis P&S
42.1
per 100K • 76 cases
US rate: 15.8
2nd of 58 in California
Higher than 94% of US counties

Shasta County recorded a combined STD rate of 429.7 per 100,000 residents in 2023, ranking 30th of 58 counties in California. Reported infections included chlamydia at 287.2 per 100,000 (518 cases, 42% below the state rate), gonorrhea at 100.4 per 100,000 (181 cases, 47% below the state rate), syphilis at 42.1 per 100,000 (76 cases, 158% above the state rate). Confidential STD testing is available throughout Shasta County — knowing your status is the only way to catch infections that often show no symptoms.

STD Trends in Shasta 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
287.2
per 100K in 2023
0.0 in 2000
Peak 381.9 in 2014
Gonorrhea
100.4
per 100K in 2023
0.0 in 2000
Peak 212.5 in 2014
Syphilis (P&S)
42.1
per 100K in 2023
0.0 in 2000
Peak 59.8 in 2020

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

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Shasta County vs California and the US

Infection Shasta County California US vs California vs US Rank in California
Chlamydia 287.2518 cases 491.1 490.7 41.5% below 41.5% below 40th of 58
Gonorrhea 100.4181 cases 190.2 178.2 47.2% below 43.7% below 28th of 58
Syphilis (P&S) 42.176 cases 16.3 15.8 158.3% above 166.5% above 2nd 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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FAQs

Shasta County ranks 30th of 58 California counties for combined STD rate in 2023, at 429.7 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Shasta County, with 518 cases at a rate of 287.2 per 100,000 residents.
STDTest.com lists confidential testing locations across Shasta 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.