STD Rates in Riverside County, California

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

Data Year: 2023 Source: CDC STI Surveillance Population: 2,492,611
Combined
641.9
per 100K
14th / 58
Chlamydia
466.9
per 100K • 11,638 cases
US rate: 490.7
15th of 58 in California
Higher than 75% of US counties
Gonorrhea
162.6
per 100K • 4,053 cases
US rate: 178.2
9th of 58 in California
Higher than 79% of US counties
Syphilis P&S
12.4
per 100K • 309 cases
US rate: 15.8
32nd of 58 in California
Higher than 67% of US counties

Riverside County has one of the higher STD burdens in California, with a combined rate of 641.9 per 100,000 residents in 2023 — ranking 14th of 58 counties. Reported infections included chlamydia at 466.9 per 100,000 (11,638 cases, 5% below the state rate), gonorrhea at 162.6 per 100,000 (4,053 cases, 15% below the state rate), syphilis at 12.4 per 100,000 (309 cases, 24% below the state rate). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Riverside County has confidential testing locations available.

STD Trends in Riverside 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
466.9
per 100K in 2023
0.0 in 2000
Peak 496.2 in 2019
Gonorrhea
162.6
per 100K in 2023
0.0 in 2000
Peak 200.3 in 2021
Syphilis (P&S)
12.4
per 100K in 2023
0.4 in 2000
Peak 19.4 in 2020

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

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Riverside County vs California and the US

Infection Riverside County California US vs California vs US Rank in California
Chlamydia 466.911,638 cases 491.1 490.7 4.9% below 4.9% below 15th of 58
Gonorrhea 162.64,053 cases 190.2 178.2 14.5% below 8.8% below 9th of 58
Syphilis (P&S) 12.4309 cases 16.3 15.8 23.9% below 21.5% below 32nd 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

Riverside County ranks 14th of 58 California counties for combined STD rate in 2023, at 641.9 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Riverside County, with 11,638 cases at a rate of 466.9 per 100,000 residents.
STDTest.com lists confidential testing locations across Riverside 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.