STD Rates in Tuolumne County, California

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

Data Year: 2023 Source: CDC STI Surveillance Population: 54,199
Combined
219.5
per 100K
50th / 58
Chlamydia
167.9
per 100K • 91 cases
US rate: 490.7
51st of 58 in California
Higher than 19% of US counties
Gonorrhea
42.4
per 100K • 23 cases
US rate: 178.2
49th of 58 in California
Higher than 35% of US counties
Syphilis P&S
9.2
per 100K • 5 cases
Based on 5 cases — interpret with care
US rate: 15.8

Tuolumne County is among the lower-burden counties in California, reporting a combined STD rate of 219.5 per 100,000 residents in 2023 — 50th of 58 counties. Reported infections included chlamydia at 167.9 per 100,000 (91 cases, 66% below the state rate), gonorrhea at 42.4 per 100,000 (23 cases, 78% below the state rate), syphilis at 9.2 per 100,000 (5 cases, too few for a reliable comparison). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Tuolumne County has confidential testing locations available.

STD Trends in Tuolumne 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
167.9
per 100K in 2023
0.0 in 2000
Peak 281.3 in 2018
Gonorrhea
42.4
per 100K in 2023
0.0 in 2000
Peak 113.3 in 2020
Syphilis (P&S)
9.2
per 100K in 2023
0.0 in 2000
Peak 26.0 in 2016

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

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Tuolumne County vs California and the US

Infection Tuolumne County California US vs California vs US Rank in California
Chlamydia 167.991 cases 491.1 490.7 65.8% below 65.8% below 51st of 58
Gonorrhea 42.423 cases 190.2 178.2 77.7% below 76.2% below 49th of 58
Syphilis (P&S) 9.25 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

Tuolumne County ranks 50th of 58 California counties for combined STD rate in 2023, at 219.5 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Tuolumne County, with 91 cases at a rate of 167.9 per 100,000 residents.
STDTest.com lists confidential testing locations across Tuolumne 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.