STD Rates in San Luis Obispo County, California

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

Data Year: 2023 Source: CDC STI Surveillance Population: 281,606
Combined
387.1
per 100K
40th / 58
Chlamydia
316.4
per 100K • 891 cases
US rate: 490.7
34th of 58 in California
Higher than 56% of US counties
Gonorrhea
65
per 100K • 183 cases
US rate: 178.2
43rd of 58 in California
Higher than 50% of US counties
Syphilis P&S
5.7
per 100K • 16 cases
Based on 16 cases — interpret with care
US rate: 15.8

San Luis Obispo County recorded a combined STD rate of 387.1 per 100,000 residents in 2023, ranking 40th of 58 counties in California. Reported infections included chlamydia at 316.4 per 100,000 (891 cases, 36% below the state rate), gonorrhea at 65.0 per 100,000 (183 cases, 66% below the state rate), syphilis at 5.7 per 100,000 (16 cases, too few for a reliable comparison). Many STDs show no symptoms, so testing is the only reliable way to know your status. Confidential options are available across San Luis Obispo County.

STD Trends in San Luis Obispo 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
316.4
per 100K in 2023
0.0 in 2000
Peak 447.1 in 2017
Gonorrhea
65.0
per 100K in 2023
0.0 in 2000
Peak 81.6 in 2016
Syphilis (P&S)
5.7
per 100K in 2023
0.0 in 2000
Peak 8.8 in 2019

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

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San Luis Obispo County vs California and the US

Infection San Luis Obispo County California US vs California vs US Rank in California
Chlamydia 316.4891 cases 491.1 490.7 35.6% below 35.5% below 34th of 58
Gonorrhea 65183 cases 190.2 178.2 65.8% below 63.5% below 43rd of 58
Syphilis (P&S) 5.716 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

San Luis Obispo County ranks 40th of 58 California counties for combined STD rate in 2023, at 387.1 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in San Luis Obispo County, with 891 cases at a rate of 316.4 per 100,000 residents.
STDTest.com lists confidential testing locations across San Luis Obispo 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.