STD Rates in Jefferson County, Colorado

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

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Data Year: 2023 Source: CDC STI Surveillance Population: 576,384
Combined
411.7
per 100K
20th / 61
Chlamydia
299.8
per 100K • 1,728 cases
Gonorrhea
103.4
per 100K • 596 cases
Syphilis P&S
8.5
per 100K • 49 cases

Jefferson County reported a combined STD rate of 411.7 per 100,000 residents in 2023, placing it 20th of 61 Colorado counties — in the upper half of the state. Reported infections included chlamydia at 299.8 per 100,000 (1,728 cases, 31% below the state rate), gonorrhea at 103.4 per 100,000 (596 cases, 20% below the state rate), syphilis at 8.5 per 100,000 (49 cases, 47% below the state rate). Routine testing is the surest way to catch STDs early, since many produce no symptoms. Jefferson County has confidential testing locations available.

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Jefferson County vs Colorado Average

Infection Jefferson County Colorado Rate Difference
Chlamydia 299.8 435.1 31% below
Gonorrhea 103.4 128.7 20% below
Syphilis (P&S) 8.5 16 47% below

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Largest cities in Jefferson County, Colorado

Largest first, by Census population. Each city page lists nearby clinics, free and low-cost testing, and labs.

STD testing in Lakewood, CO156,583 people → STD testing in Arvada, CO122,634 people → STD testing in Ken Caryl, CO33,233 people → STD testing in Wheat Ridge, CO32,070 people → STD testing in Columbine, CO25,478 people → STD testing in Golden, CO20,417 people → STD testing in Evergreen, CO8,602 people →

Largest Counties in Colorado

El Paso County → Denver County → Arapahoe County → Adams County → Douglas County → Larimer County → Weld County → Boulder County → Pueblo County → Mesa County →

All 61 Colorado counties → STD testing in Colorado →

FAQs

Jefferson County ranks 20th of 61 Colorado counties for combined STD rate in 2023, at 411.7 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Jefferson County, with 1,728 cases at a rate of 299.8 per 100,000 residents.
STDTest.com lists confidential testing locations across Jefferson County and Colorado. Many offer same-day appointments with results in 1–3 days.

Related Resources

STD Testing Window Periods How Soon After Sex to Test STD Symptoms Guide Testing Timeline Chart All Testing Clinics STD Statistics and Data
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.
Sources