STD Rates in Ventura County, California

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

Data Year: 2023 Source: CDC STI Surveillance Population: 829,531
Combined
485.8
per 100K
26th / 58
Chlamydia
390.1
per 100K • 3,236 cases
US rate: 490.7
23rd of 58 in California
Higher than 68% of US counties
Gonorrhea
85.2
per 100K • 707 cases
US rate: 178.2
33rd of 58 in California
Higher than 60% of US counties
Syphilis P&S
10.5
per 100K • 87 cases
US rate: 15.8
38th of 58 in California
Higher than 62% of US counties

Ventura County reported a combined STD rate of 485.8 per 100,000 residents in 2023, placing it 26th of 58 California counties — in the upper half of the state. Reported infections included chlamydia at 390.1 per 100,000 (3,236 cases, 21% below the state rate), gonorrhea at 85.2 per 100,000 (707 cases, 55% below the state rate), syphilis at 10.5 per 100,000 (87 cases, 36% below the state rate). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Ventura County has confidential testing locations available.

STD Trends in Ventura 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
390.1
per 100K in 2023
0.0 in 2000
Peak 400.9 in 2019
Gonorrhea
85.2
per 100K in 2023
0.0 in 2000
Peak 110.7 in 2021
Syphilis (P&S)
10.5
per 100K in 2023
0.1 in 2000
Peak 15.4 in 2021

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

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Ventura County vs California and the US

Infection Ventura County California US vs California vs US Rank in California
Chlamydia 390.13,236 cases 491.1 490.7 20.6% below 20.5% below 23rd of 58
Gonorrhea 85.2707 cases 190.2 178.2 55.2% below 52.2% below 33rd of 58
Syphilis (P&S) 10.587 cases 16.3 15.8 35.6% below 33.5% below 38th 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

Ventura County ranks 26th of 58 California counties for combined STD rate in 2023, at 485.8 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Ventura County, with 3,236 cases at a rate of 390.1 per 100,000 residents.
STDTest.com lists confidential testing locations across Ventura 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.