STD Rates in San Bernardino County, California

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

Data Year: 2023 Source: CDC STI Surveillance Population: 2,195,695
Combined
741
per 100K
8th / 58
Chlamydia
562.1
per 100K • 12,342 cases
US rate: 490.7
8th of 58 in California
Higher than 83% of US counties
Gonorrhea
164.6
per 100K • 3,615 cases
US rate: 178.2
8th of 58 in California
Higher than 79% of US counties
Syphilis P&S
14.3
per 100K • 315 cases
US rate: 15.8
25th of 58 in California
Higher than 71% of US counties

San Bernardino County has one of the higher STD burdens in California, with a combined rate of 741.0 per 100,000 residents in 2023 — ranking 8th of 58 counties. Reported infections included chlamydia at 562.1 per 100,000 (12,342 cases, 14% above the state rate), gonorrhea at 164.6 per 100,000 (3,615 cases, 13% below the state rate), syphilis at 14.3 per 100,000 (315 cases, 12% below the state rate). Routine testing is the surest way to catch STDs early, since many produce no symptoms. San Bernardino County has confidential testing locations available.

STD Trends in San Bernardino 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
562.1
per 100K in 2023
0.0 in 2000
Peak 631.9 in 2019
Gonorrhea
164.6
per 100K in 2023
0.0 in 2000
Peak 253.0 in 2021
Syphilis (P&S)
14.3
per 100K in 2023
0.6 in 2000
Peak 21.9 in 2019

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

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San Bernardino County vs California and the US

Infection San Bernardino County California US vs California vs US Rank in California
Chlamydia 562.112,342 cases 491.1 490.7 14.5% above 14.6% above 8th of 58
Gonorrhea 164.63,615 cases 190.2 178.2 13.5% below 7.6% below 8th of 58
Syphilis (P&S) 14.3315 cases 16.3 15.8 12.3% below 9.5% below 25th 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

San Bernardino County ranks 8th of 58 California counties for combined STD rate in 2023, at 741.0 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in San Bernardino County, with 12,342 cases at a rate of 562.1 per 100,000 residents.
STDTest.com lists confidential testing locations across San Bernardino 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.