STD Rates in Stanislaus County, California

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

Data Year: 2023 Source: CDC STI Surveillance Population: 551,465
Combined
530.4
per 100K
19th / 58
Chlamydia
399.3
per 100K • 2,202 cases
US rate: 490.7
22nd of 58 in California
Higher than 68% of US counties
Gonorrhea
106.6
per 100K • 588 cases
US rate: 178.2
25th of 58 in California
Higher than 66% of US counties
Syphilis P&S
24.5
per 100K • 135 cases
US rate: 15.8
7th of 58 in California
Higher than 85% of US counties

Stanislaus County reported a combined STD rate of 530.4 per 100,000 residents in 2023, placing it 19th of 58 California counties — in the upper half of the state. Reported infections included chlamydia at 399.3 per 100,000 (2,202 cases, 19% below the state rate), gonorrhea at 106.6 per 100,000 (588 cases, 44% below the state rate), syphilis at 24.5 per 100,000 (135 cases, 50% above the state rate). Many STDs show no symptoms, so testing is the only reliable way to know your status. Confidential options are available across Stanislaus County.

STD Trends in Stanislaus 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
399.3
per 100K in 2023
0.0 in 2000
Peak 586.2 in 2019
Gonorrhea
106.6
per 100K in 2023
0.0 in 2000
Peak 229.5 in 2020
Syphilis (P&S)
24.5
per 100K in 2023
0.2 in 2000
Peak 46.8 in 2021

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

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Stanislaus County vs California and the US

Infection Stanislaus County California US vs California vs US Rank in California
Chlamydia 399.32,202 cases 491.1 490.7 18.7% below 18.6% below 22nd of 58
Gonorrhea 106.6588 cases 190.2 178.2 44% below 40.2% below 25th of 58
Syphilis (P&S) 24.5135 cases 16.3 15.8 50.3% above 55.1% above 7th 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

Stanislaus County ranks 19th of 58 California counties for combined STD rate in 2023, at 530.4 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Stanislaus County, with 2,202 cases at a rate of 399.3 per 100,000 residents.
STDTest.com lists confidential testing locations across Stanislaus 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.