STD Rates in Monterey County, California

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

Data Year: 2023 Source: CDC STI Surveillance Population: 430,723
Combined
581.8
per 100K
17th / 58
Chlamydia
498
per 100K • 2,145 cases
US rate: 490.7
12th of 58 in California
Higher than 78% of US counties
Gonorrhea
70.3
per 100K • 303 cases
US rate: 178.2
37th of 58 in California
Higher than 53% of US counties
Syphilis P&S
13.5
per 100K • 58 cases
US rate: 15.8
28th of 58 in California
Higher than 69% of US counties

Monterey County reported a combined STD rate of 581.8 per 100,000 residents in 2023, placing it 17th of 58 California counties — in the upper half of the state. Reported infections included chlamydia at 498.0 per 100,000 (2,145 cases, 1% above the state rate), gonorrhea at 70.3 per 100,000 (303 cases, 63% below the state rate), syphilis at 13.5 per 100,000 (58 cases, 17% below the state rate). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Monterey County has confidential testing locations available.

STD Trends in Monterey 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
498.0
per 100K in 2023
0.0 in 2000
Peak 558.7 in 2019
Gonorrhea
70.3
per 100K in 2023
0.0 in 2000
Peak 146.6 in 2021
Syphilis (P&S)
13.5
per 100K in 2023
0.5 in 2000
Peak 15.2 in 2022

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

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Monterey County vs California and the US

Infection Monterey County California US vs California vs US Rank in California
Chlamydia 4982,145 cases 491.1 490.7 1.4% above 1.5% above 12th of 58
Gonorrhea 70.3303 cases 190.2 178.2 63% below 60.5% below 37th of 58
Syphilis (P&S) 13.558 cases 16.3 15.8 17.2% below 14.6% below 28th 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

Monterey County ranks 17th of 58 California counties for combined STD rate in 2023, at 581.8 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Monterey County, with 2,145 cases at a rate of 498.0 per 100,000 residents.
STDTest.com lists confidential testing locations across Monterey 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.