STD Rates in Weld County, Colorado

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

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Data Year: 2023 Source: CDC STI Surveillance Population: 359,452
Combined
415.9
per 100K
19th / 61
Chlamydia
343.3
per 100K • 1,234 cases
Gonorrhea
66.5
per 100K • 239 cases
Syphilis P&S
6.1
per 100K • 22 cases

Weld County reported a combined STD rate of 415.9 per 100,000 residents in 2023, placing it 19th of 61 Colorado counties — in the upper half of the state. Reported infections included chlamydia at 343.3 per 100,000 (1,234 cases, 21% below the state rate), gonorrhea at 66.5 per 100,000 (239 cases, 48% below the state rate), syphilis at 6.1 per 100,000 (22 cases, 62% below the state rate). Many STDs show no symptoms, so testing is the only reliable way to know your status. Confidential options are available across Weld County.

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Weld County vs Colorado Average

Infection Weld County Colorado Rate Difference
Chlamydia 343.3 435.1 21% below
Gonorrhea 66.5 128.7 48% below
Syphilis (P&S) 6.1 16 62% below

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Largest cities in Weld County, Colorado

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

STD testing in Greeley, CO110,806 people → STD testing in Windsor, CO37,914 people → STD testing in Erie, CO33,808 people → STD testing in Evans, CO22,396 people → STD testing in Johnstown, CO18,883 people → STD testing in Firestone, CO18,049 people → STD testing in Frederick, CO16,651 people → STD testing in Severance, CO10,130 people → STD testing in Fort Lupton, CO8,897 people → STD testing in Milliken, CO8,871 people →
Show all 11 cities ↓Show fewer cities ↑
STD testing in Lochbuie, CO8,609 people →

Largest Counties in Colorado

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

All 61 Colorado counties → STD testing in Colorado →

FAQs

Weld County ranks 19th of 61 Colorado counties for combined STD rate in 2023, at 415.9 per 100,000 residents.
In 2023, chlamydia was the most frequently reported STD in Weld County, with 1,234 cases at a rate of 343.3 per 100,000 residents.
STDTest.com lists confidential testing locations across Weld 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